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True Crime Case Database
Mass Murders in the United States
Documented records of mass murders (4 or more victims killed), archived to help the true crime community research criminal patterns and the history of high-profile homicides. Open any case for the full story, victims and source links.
281 Cases
1,836 Victims killed
1966–2026 Years covered
Viewer discretion advised. These cases describe violent crimes and may be disturbing. Know of a case that isn't listed, or spot an error?
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Location Spangle, Washington
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Location Mundelein, Illinois
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Location Erie, Pennsylvania
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Location Douglas, Georgia
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Location San Benito, Texas
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Location Billings, Montana
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Location Forest Grove, Oregon
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Location Bend, Oregon
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Location Tumbler Ridge, British Columbia
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Location Sacramento, California
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Location Hamilton, New York
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Location Flushing, New York
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Location Lake City, Michigan
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Location Winfield, Kansas
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Location Sardis, Georgia
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Location Twin Falls, Idaho
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Location Grand Haven, Michigan
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Location East St Louis, Illinois
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Location Rittman, Ohio
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Location Livonia, Michigan
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Location Cheektowaga, New York
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Location Muscatine, Iowa
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Location Los Angeles, California
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Location Thornton, Colorado
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Location San Diego, California
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Location Houston, Texas
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Location Plant City, Florida
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Location Columbia, Kentucky
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Location Shreveport, Louisiana
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Location Plainville, Connecticut
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Location Amarillo, Texas
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Location Bayville, New Jersey
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Location Austin, Texas
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Location Edinburg, Texas
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Location Pawtucket, Rhode Island
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Location Sarasota, Florida
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Location Plainview, Texas
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Location Rancho Cordova, California
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Location Lawrenceville, Georgia
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Location Cedar Bluff, Mississippi
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Location Wavertly, Tennessee
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Location Mercer Island, Washington
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Location Providence, Rhode Island
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Location Stockton, California
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Location Tiffin, Ohio
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Location San Antonio, Texas
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Location Bronx, New York
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Location Pima, Arizona
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Location St Helena Island, South Carolina
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Location Leland, Mississippi
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Location Houston, Texas
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Location Grand Blanc, Michigan
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Location York County, Pennsylvania
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Location Cincinnati, Ohio
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Location Madbury, New Hampshire
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Location Daphne, Alabama
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Location Picket Creek, Oregon
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Location Denver, Colorado
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Location Denver, Colorado
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Location Denver, Colorado
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Location Denver, California
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Location Denver, California
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Location Waukesha, Wisconsin
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Location Moscow, Idaho
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Location New York, New York
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Location Troy, New York
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Location Troy, New York
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Location Broken Arrow, Oklahoma
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Location Broken Arrow, Oklahoma
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Location Washington, District of Columbia
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Location Manhatten, New York
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Location Farmville, Virginia
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Location Beason, Illinois
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Location Richmond, Virginia
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Location Richmond, Virginia
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Location Deltona, Florida
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Location Deltona, Florida
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Location Deltona, Florida
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Location Deltona, Florida
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Location Anaconda, Montana
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Location New York, New York
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Location Winder, Georgia
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Location Forest Park, Illinois
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Location Fordyce, Arkansas
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Location Lewiston, Maine
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Location Hampton, Georgia
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Location Philadelphia, Pennsylvania
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Location Allen, Texas
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Location Louisville, Kentucky
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Location Nashville, Tennessee
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Location Half Moon Bay, California
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Location Monterey Park, California
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Location Chesapeake, Virginia
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Location Colorado Springs, Colorado
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Location Raleigh, North Carolina
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Location Highland Park, Illinois
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Location Tulsa, Oklahoma
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Location Uvalde, Texas
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Location Buffalo, New York
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Location Denver, Colorado
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Location Oxford, Michigan
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Location San Jose, California
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Location Indianapolis, Indiana
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Location Orange, California
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Location Boulder, Colorado
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Location Atlanta, Georgia
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Location Chicago, Illinois
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Location Springfield, Missouri
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Location Milwaukee, Wisconsin
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Location Jersey City, New Jersey
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Location Jersey City, New Jersey
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Location Kansas City, Kansas
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Location Kansas City, Kansas
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Location Midland-Odessa, Texas
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Location Dayton, Ohio
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Location El Paso, Texas
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Location Virginia Beach, Virginia
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Location Aurora, Illinois
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Location Sebring, Florida
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Location Thousand Oaks, California
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Location Pittsburgh, Pennsylvania
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Location Bakersfield, California
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Location Annapolis, Maryland
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Location Santa Fe, Texas
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Location Antioch, Tennessee
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Location Detroit, Michigan
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Location Parkland, Florida
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Location Melcroft, Saltlick Township, Pennsylvania
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Location Rancho Tehama Reserve, California
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Location Sutherland Springs, Texas
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Location Las Vegas, Nevada
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Location Orlando, Florida
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Location Rothschild, Wisconsin
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Location Yazoo City, Mississippi
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Location Fort Lauderdale, Florida
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Location Burlington, Washington
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Location Dallas, Texas
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Location Orlando, Florida
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Location Kalamazoo, Michigan
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Location San Bernardino, California
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Location San Bernardino, California
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Location Tennessee Colony, Texas
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Location Roseburg, Oregon
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Location Chattanooga, Tennessee
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Location Charleston, South Carolina
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Location Marysville, Washington
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Location Isla Vista, California
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Location Alturas, California
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Location Washington D.C., District of Columbia
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Location Hialeah, Florida
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Location Santa Monica, California
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Location Federal Way, Washington
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Location Herkimer, New York
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Location Sandy Hook, Connecticut
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Location Minneapolis, Minnesota
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Location Oak Creek, Wisconsin
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Location Aurora, Colorado
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Location Seattle, Washington
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Location Oakland, California
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Location Seal Beach, California
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Location Carson City, Nevada
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Location Akron, Ohio
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Location Tucson, Arizona
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Location Jackson, Kentucky
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Location Manchester, Connecticut
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Location Hialeah, Florida
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Location North Hollywood, California
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Location Parkland, Washington
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Location Fort Hood, Texas
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Location Mount Airy, North Carolina
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Location Binghamton, New York
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Location Carthage, North Carolina
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Location Alger, Washington
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Location Henderson, Kentucky
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Location Santa Maria, California
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Location Dekalb, Illinois
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Location Kirkwood, Missouri
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Location Arvada, Colorado
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Location Omaha, Nebraska
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Location Blacksburg, Virginia
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Location Salt Lake City, Utah
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Location Paradise, Pennsylvania
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Location Baton Rouge, Louisiana
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Location Seattle, Washington
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Location Goleta, California
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Location Honey Grove, Texas
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Location Red Lake, Minnesota
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Location Brookfield, Wisconsin
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Location Atlanta, Georgia
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Location Columbus, Ohio
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Location Birchwood, Wisconsin
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Location Kansas City, Kansas
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Location Oldtown, Idaho
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Location Chicago, Illinois
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Location Meridian, Mississippi
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Location Huntsville, Alabama
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Location South Bend, Indiana
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Location Sacramento, California
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Location Rifle, Colorado
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Location Lisle, Illinois
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Location Houston, Texas
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Location Wakefield, Massachusetts
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Location Pittsburgh, Pennsylvania
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Location Irving, Texas
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Location Tampa, Florida
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Location Honolulu, Hawaii
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Location Fort Worth, Texas
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Location Atlanta, Georgia
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Location Las Vegas, Nevada
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Location Littleton, Colorado
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Location Littleton, Colorado
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Location Gonzales, Louisiana
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Location Springfield, Oregon
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Location Jonesboro, Arkansas
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Location Jonesboro, Arkansas
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Location Rocky Hill, Connecticut
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Location Orange, California
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Location Bartow, Florida
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Location Aiken, South Carolina
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Location Colebrook, New Hampshire
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Location Jackson, Mississippi
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Location Fort Lauerdale, Florida
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Location Bronx, New York
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Location Los Angeles, California
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Location Corpus Christi, Texas
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Location Raeford, North Carolina
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Location Fairchild Air Force Base, Washington
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Location Aurora, Colorado
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Location Garden City Park, New York
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Location Oxnard, California
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Location El Cajon, California
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Location Fayetteville, North Carolina
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Location San Francisco, California
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Location Paso Robles, California
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Location Watkins Glen, New York
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Location Olivehurst, California
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Location Phoenix, Arizona
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Location Royal Oak, Michigan
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Location Harrodsburg, Kentucky
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Location Iowa City, Iowa
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Location Killeen, Texas
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Location Ridgewood, New Jersey
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Location Jacksonville, Florida
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Location Louisville, Kentucky
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Location Stockton, California
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Location Chicago, Illinois
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Location Winston Salem, North Carolina
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Location Sunnyvale, California
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Location Palm Bay, Florida
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Location Edmond, Oklahoma
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Location South Connellsville, Pennsylvania
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Location Hot Springs National Park, Arkansas
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Location San Ysidro, California
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Location Dallas, Texas
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Location Manley Hot Springs, Alaska
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Location College Station, Texas
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Location McCarthy, Alaska
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Location Manhattan, New York
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Location Miami, Florida
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Location Grand Prairie, Texas
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Location Anchorage, Alaska
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Location Allen, Kentucky
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Location Salem, Oregon
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Location Coraopolis, Pennsylvania
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Location Daingerfield, Texas
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Location El Paso, Texas
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Location Warwick, Rhode Island
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Location Hackettstown, New Jersey
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Location Klamath Falls, Oregon
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Location New Rochelle, New York
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Location Fullerton, California
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Location Smith River, California
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Location New Orleans, Louisiana
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Location Cherry Hill, New Jersey
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Location Raleigh, North Carolina
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Location Albany, New York
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Location Harrisburg, Pennsylvania
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Location Ironwood, Michigan
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Location Lock Haven, Pennsylvania
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Location Mesa, Arizona
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Location Austin, Texas
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The Citizen Detective Role
Are you a citizen detective or armchair detective ? Many mass murderers may have potential links to current unsolved cold cases . Use this database to research patterns, then share your findings in our forums or build your own evidence board.
