Crime Solvers Central
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 (MP18319) and 4 other sources
David L. Sumner, 25, was last seen on January 3, 2000, in Katy, Texas. Originally from New York, Sumner had moved to Texas in mid-1999. On the day of his disappearance, he contacted his father, which was the last time anyone heard from him. Sumner, who suffers from a learning disability and is very nearsighted, wore eyeglasses and had previously fractured his arm. Despite an ongoing investigation, few details about his disappearance have surfaced, and his current whereabouts remain unknown. His case is classified as an endangered missing person.

The Harris County Sheriff's Office is handling the investigation, and anyone with information is encouraged to contact local authorities.

Last Seen: Jan 3, 2000

Possible Unidentified Matches (10)

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.

83%Moderate
John Doe — Galveston, Texas - unidentified case UP3478
John Doe — Galveston, Texas
UP3478 • Found Dec 5, 2000
View case
Sex ✓Male
Age 100%Est. 20–30 vs 25
Race 100%White
Location 84%68 mi away, same state
TimingFound 11 months after last seen
Height 100%5'6" vs 5'7"
Weight 100%150 lb vs 140 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Houston, Texas - unidentified case UP162311
John Doe — Houston, Texas
UP162311 • Found Aug 26, 2026
View case
Sex ✓Male
Age 100%Est. 38–52 vs 25 when missing
Race 100%White
Location 95%28 mi away, same county
TimingFound 27 years after last seen
Height 100%5'6" vs 5'7"
Weight 99%125 lb vs 140 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
80%Moderate
John Doe — Houston, Texas - unidentified case UP485
John Doe — Houston, Texas
UP485 • Found Mar 23, 2007
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Sex ✓Male
Age 100%Est. 30–45 vs 25 when missing
Race 100%White
Location 96%23 mi away, same county
TimingFound 7 years after last seen
Height 100%5'7" vs 5'7"
Weight 73%107 lb vs 140 lb
79%Possible
John Doe — Houston, Texas - unidentified case UP7699
John Doe — Houston, Texas
UP7699 • Found Jul 17, 2010
View case
Sex ✓Male
Age 100%Est. 30–45 vs 25 when missing
Race 100%White
Location 100%10 mi away, same county
TimingFound 11 years after last seen
Height 100%5'8" vs 5'7"
Weight 0%230 lb vs 140 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
78%Possible
John Doe — Texas
UP3519 • Found Mar 15, 2000
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Sex ✓Male
Age 100%Est. 17–25 vs 25
Race 100%White
Location 54%213 mi away, same state
TimingFound 2 months after last seen
Height 100%5'7" vs 5'7"
Weight 100%130 lb vs 140 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
77%Possible
John Doe — Houston, Texas - unidentified case UP3080
John Doe — Houston, Texas
UP3080 • Found Jan 18, 2009
View case
Sex ✓Male
Age 100%Est. 20–35 vs 25 when missing
Race 60%Hispanic
Location 96%27 mi away, same county
TimingFound 9 years after last seen
Height 100%5'7" vs 5'7"
Weight 83%166 lb vs 140 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
77%Possible
John Doe — Texas
UP3157 • Found Apr 28, 2007
View case
Sex ✓Male
Age 77%Est. 35–45 vs 25 when missing
Race 100%White
Location 85%64 mi away, same state
TimingFound 7 years after last seen
Height 100%5'6" vs 5'7"
Weight 96%157 lb vs 140 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
77%Possible
John Doe — Houston, Texas - unidentified case UP8651
John Doe — Houston, Texas
UP8651 • Found Dec 28, 2005
View case
Sex ✓Male
Age 100%Est. 25–40 vs 25 when missing
Race 100%White
Location 96%23 mi away, same county
TimingFound 6 years after last seen
Height 36%5'2" vs 5'7"
Weight 84%165 lb vs 140 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
77%Possible
John Doe — Houston, Texas
UP781 • Found Sep 23, 2005
View case
Sex ✓Male
Age 85%Est. 30–55 vs 25 when missing
Race 100%White
Location 96%23 mi away, same county
TimingFound 6 years after last seen
Height 84%5'5" vs 5'7"
Weight 71%106 lb vs 140 lb
76%Possible
John Doe — Houston, Texas - unidentified case UP102436
John Doe — Houston, Texas
UP102436 • Found Apr 6, 2023
View case
Sex ✓Male
Age 85%Est. 40–60 vs 25 when missing
Race 100%White
Location 95%27 mi away, same county
TimingFound 23 years after last seen
Height 100%5'8" vs 5'7"
Hair 100%Brown vs Brown

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.