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Crime Solvers Central
302 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP87879) and 1 other source
In the spring of 2015, a sense of quiet concern began to grow among the family and friends of Gregory Glenn Robinson. A 47-year-old man, Gregory was last known to be in Phoenix, Arizona, on or around May 12, 2015. At the time of his disappearance, he was described as a white male, standing at 5 feet 9 inches tall and weighing approximately 250 pounds. He had graying hair and brown eyes. The circumstances surrounding his last known whereabouts are not publicly detailed, leaving a void of information for those who cared for him. The days turned into weeks, and with no word from Gregory, the worry deepened into a painful uncertainty that would stretch on for years.

The official report of his disappearance was not filed until much later, on June 7, 2019, when the Phoenix Police Department opened an investigation into his case. The reasons for this delay are not publicly known, but it marked the formal beginning of the search for answers. His case was entered into the National Missing and Unidentified Persons System a national database for missing persons, under the number MP87879. This step ensured that his information was accessible to law enforcement agencies and medical examiners across the country, a crucial tool in the effort to locate him. The case was assigned to Detective Daniel Nonnemacher of the Phoenix Police Department, who became the point of contact for any potential leads or information.

Despite the passage of time, the case of Gregory Glenn Robinson remains open. The lack of public information regarding the circumstances of his disappearance has made it a particularly challenging case to solve, leaving his loved ones in a prolonged state of limbo. The city of Phoenix has a significant number of unsolved missing persons cases, each representing a family waiting for answers. The investigation into what happened to Gregory continues, a quiet and persistent effort to bring closure to a story that has been without an ending for far too long. The overview of the case is one of sparse details and a timeline that underscores the enduring hope and the painful reality for those who are left waiting when a loved one vanishes.

Last Seen: May 12, 2015

Links to Additional Sources (1)

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Possible Unidentified Matches (4)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

79%Possible
John Doe — Rio Verde, Arizona - unidentified case UP118816
John Doe — Rio Verde, Arizona
UP118816 • Found Mar 3, 2024
View case
Sex ✓Male
Age 100%Est. 38–52 vs 47 when missing
Race 100%White
Location 94%33 mi away, same county
TimingFound 9 years after last seen
Height 100%5'6"–5'8" vs 5'9"
79%Possible
John Doe — Peoria, Arizona - unidentified case UP142022
John Doe — Peoria, Arizona
UP142022 • Found Feb 12, 2025
View case
Sex ✓Male
Age 99%Est. 57–70 vs 47 when missing
Race 100%White
Location 96%25 mi away, same county
TimingFound 10 years after last seen
Height 100%5'10" vs 5'9"
Weight 28%120–150 lb vs 250 lb
Hair 100%Gray vs Gray
77%Possible
John Doe — Rio Verde, Arizona - unidentified case UP13861
John Doe — Rio Verde, Arizona
UP13861 • Found Apr 28, 2015
View case
Sex ✓Male
Age 82%Est. 50–65 vs 47
Race 100%White
Location 94%33 mi away, same county
TimingFound same day as last seen
Height 84%5'11" vs 5'9"
Hair 40%Brown vs Gray
76%Possible
John Doe — Phoenix, Arizona - unidentified case UP95516
John Doe — Phoenix, Arizona
UP95516 • Found Jul 30, 2022
View case
Sex ✓Male
Age 100%Est. 38–52 vs 47 when missing
Race 100%White
Location 100%7 mi away, same county
TimingFound 7 years after last seen

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.