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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 (MP155863) and 2 other sources
Stephen Douglas Penta is listed in NamUs as a 26-year-old white man who was last seen in Santa Cruz, California, on August 1, 1975. The publicly available record describes him as about 6 feet tall and about 185 pounds, with red or auburn hair, while his eye color is listed as unknown. The case is now published in the National Missing and Unidentified Persons System, the federal clearinghouse used to support long-term missing person investigations across the United States.

What is publicly known about Stephen Penta’s disappearance is very limited, which is often one of the hardest realities in older missing-person cases. NamUs states that he was last seen in Santa Cruz in August 1975, and adds one striking detail from earlier that year: he had reportedly been contacted by law enforcement in Toronto while attempting to re-enter the United States. Beyond that, the public case file does not provide a fuller narrative explaining where he was headed, who last saw him, what he was wearing, or what events may have led to his disappearance. That lack of detail leaves a painful gap around his final known movements and underscores how difficult it can be to reconstruct a disappearance after so many decades.

The case is being handled by the Santa Cruz Police Department, and the NamUs listing identifies it as agency case number 25S-06691, reported in December 2025 by a cold case investigator. The current public NamUs entry does not indicate that Stephen Penta has been found alive or located deceased, so there is no public sign in the available online sources that the case has been resolved. NamUs exists specifically to help investigators and families in long-term missing-person cases by centralizing case information and supporting forensic comparisons, which means even an older case like this remains capable of generating leads, renewed attention, and, hopefully, answers. For the people who have carried Stephen’s absence for decades, the sparse public record only makes that uncertainty more heartbreaking.

Last Seen: Aug 1, 1975

Links to Additional Sources (2)

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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.

82%Moderate
John Doe — Unincorporated, California
UP10662 • Found Jun 7, 1978
View case
Sex ✓Male
Age 100%Est. 20–30 vs 26 when missing
Race 100%White
Location 93%38 mi away, same state
TimingFound 3 years after last seen
Height 100%5'11" vs 6'0"
Weight 93%160 lb vs 185 lb
Hair 50%Brown vs Red
79%Possible
John Doe — San Martin, California
UP123466 • Found Apr 13, 1986
View case
Sex ✓Male
Age 100%Est. 18–32 vs 26 when missing
Race 100%White
Location 96%24 mi away, same state
TimingFound 11 years after last seen
Height 84%5'10" vs 6'0"
Weight 88%155 lb vs 185 lb
Hair 50%Brown vs Red
78%Possible
John Doe — San Francisco, California
UP5872 • Found Oct 16, 1981
View case
Sex ✓Male
Age 100%Est. 20–30 vs 26 when missing
Race 100%White
Location 87%59 mi away, same state
TimingFound 6 years after last seen
Height 84%5'10" vs 6'0"
Weight 85%153 lb vs 185 lb
Hair 50%Brown vs Red
78%Possible
John Doe — Sacramento, California
UP2414 • Found Feb 6, 1977
View case
Sex ✓Male
Age 100%Est. 18–30 vs 26 when missing
Race 100%White
Location 71%118 mi away, same state
TimingFound 18 months after last seen
Height 100%6'0" vs 6'0"
Weight 98%165 lb vs 185 lb
Hair 50%Brown vs Red
78%Possible
John Doe — San Francisco, California
UP5843 • Found Aug 3, 1975
View case
Sex ✓Male
Age 85%Est. 20–40 vs 26
Race 100%White
Location 87%59 mi away, same state
TimingFound 2 days after last seen
Height 84%5'10" vs 6'0"
Weight 100%172 lb vs 185 lb
Hair 50%Brown vs Red
77%Possible
John Doe — Sausalito, California
UP17718 • Found Sep 9, 1990
View case
Sex ✓Male
Age 100%Est. 35–45 vs 26 when missing
Race 100%White
Location 85%66 mi away, same state
TimingFound 15 years after last seen
Height 100%5'11" vs 6'0"
Weight 93%160 lb vs 185 lb
Hair 50%Brown vs Red
77%Possible
John Doe — San Francisco, California
UP5866 • Found May 30, 1980
View case
Sex ✓Male
Age 85%Est. 20–40 vs 26 when missing
Race 100%White
Location 87%59 mi away, same state
TimingFound 5 years after last seen
Height 100%5'11" vs 6'0"
Weight 71%140 lb vs 185 lb
76%Possible
John Doe — San Jose, California - unidentified case UP57876
John Doe — San Jose, California
UP57876 • Found Oct 15, 2017
View case
Sex ✓Male
Age 100%Est. 48–62 vs 26 when missing
Race 100%White
Location 96%27 mi away, same state
TimingFound 42 years after last seen
Height 100%5'11" vs 6'0"
Weight 26%260 lb vs 185 lb
Hair 70%Gray vs Red
76%Possible
John Doe — San Jose, California
UP127425 • Found Jun 14, 1997
View case
Sex ✓Male
Age 100%Est. 38–52 vs 26 when missing
Race 100%White
Location 96%25 mi away, same state
TimingFound 22 years after last seen
Height 84%5'10" vs 6'0"
Weight 70%139 lb vs 185 lb
Hair 50%Brown vs Red
76%Possible
John Doe — Berkeley, California - unidentified case UP53302
John Doe — Berkeley, California
UP53302 • Found Mar 19, 1985
View case
Sex ✓Male
Age 100%Est. 20–30 vs 26 when missing
Race 100%White
Location 85%63 mi away, same state
TimingFound 10 years after last seen
Height 84%5'10" vs 6'0"
Weight 67%137 lb vs 185 lb
Hair 50%Brown vs Red

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.