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

Case Description

Any updates on this case? Let us know!
Summary based on the NamUs case record (MP12861) and 5 other sources
Rebecca "Becky" Rodriguez, a 16-year-old, was last seen on the evening of July 16, 1977, in Brentwood, California. She was with her older sister, 19-year-old Evangeline Silva, and Silva’s boyfriend, Kenneth John Beltram. The trio had spent time in Brentwood Park before telling others they were heading either to Oakley or Hogg Island. Rebecca and her sister were last seen getting into Beltram’s car.

Beltram was reportedly seen the next morning without the two women, and neither he nor the sisters were ever heard from again. His car, a pearl-white 1960 Chevrolet with a large dent, was spotted weeks later being driven by an unidentified man, but the vehicle and its occupants vanished before they could be traced. Despite searches, no significant leads have emerged, and the circumstances of their disappearance remain suspicious.

Authorities have investigated several possibilities, including the involvement of foul play, but no conclusions have been drawn. The case remains open, and the Contra Costa County Sheriff's Department continues to seek information that may help solve this decades-old mystery.

Last Seen: Jul 16, 1977

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.

78%Possible
Jane Doe — San Jose, California - unidentified case UP125213
Jane Doe — San Jose, California
UP125213 • Found Oct 27, 1985
View case
Sex ✓Female
Age 100%Est. 18–32 vs 16 when missing
Race 100%White
Location 91%42 mi away, same state
TimingFound 8 years after last seen
Height 100%5'2" vs 5'2"
Weight 75%135 lb vs 110 lb
Hair 15%Black vs Red
77%Possible
Jane Doe — California - unidentified case UP17572
Jane Doe — California
UP17572 • Found Oct 30, 1980
View case
Sex ✓Female
Age 100%Est. 18–27 vs 16 when missing
Race 100%White
Location 77%94 mi away, same state
TimingFound 3 years after last seen
Height 100%5'0"–5'5" vs 5'2"
Hair 50%Brown vs Red
77%Possible
Jane Doe — San Francisco, California - unidentified case UP5932
Jane Doe — San Francisco, California
UP5932 • Found Apr 5, 1991
View case
Sex ✓Female
Age 85%Est. 20–40 vs 16 when missing
Race 100%White
Location 92%41 mi away, same state
TimingFound 14 years after last seen
Height 100%5'2" vs 5'2"
Weight 100%100 lb vs 110 lb
Hair 50%Brown vs Red
Eyes 60%Brown vs Hazel
76%Possible
Jane Doe — San Jose, California - unidentified case UP129724
Jane Doe — San Jose, California
UP129724 • Found Jan 23, 2021
View case
Sex ✓Female
Age 100%Est. 58–72 vs 16 when missing
Race 100%White
Location 90%49 mi away, same state
TimingFound 44 years after last seen
Height 100%5'3"–5'5" vs 5'2"
Weight 100%120–125 lb vs 110 lb
Hair 50%Brown vs Red
Eyes 30%Blue vs Hazel
76%Possible
Jane Doe — San Francisco, California
UP7323 • Found Dec 23, 2009
View case
Sex ✓Female
Age 85%Est. 50–75 vs 16 when missing
Race 100%White
Location 91%43 mi away, same state
TimingFound 32 years after last seen
Height 100%5'3" vs 5'2"
Weight 100%100 lb vs 110 lb
Hair 70%Gray vs Red
75%Possible
Jane Doe — San Francisco, California
UP9160 • Found Apr 22, 2011
View case
Sex ✓Female
Age 85%Est. 25–50 vs 16 when missing
Race 100%White
Location 92%41 mi away, same state
TimingFound 34 years after last seen
Height 100%5'2" vs 5'2"
Weight 93%125 lb vs 110 lb
Hair 50%Brown vs Red
Eyes 60%Brown vs Hazel
75%Possible
Jane Doe — San Francisco, California
UP5958 • Found Jun 19, 2004
View case
Sex ✓Female
Age 85%Est. 40–60 vs 16 when missing
Race 100%White
Location 91%45 mi away, same state
TimingFound 27 years after last seen
Height 100%5'1" vs 5'2"
Weight 100%109 lb vs 110 lb
Hair 70%Gray vs Red
Eyes 30%Blue vs Hazel
75%Possible
Jane Doe — Martinez, California
UP12473 • Found Aug 5, 1989
View case
Sex ✓Female
Age 100%Est. 17–30 vs 16 when missing
Race 100%White
Location 96%25 mi away, same county
TimingFound 12 years after last seen
Hair 100%Red vs Red
75%Possible
Jane Doe — San Francisco, California
UP5906 • Found Jan 7, 1985
View case
Sex ✓Female
Age 85%Est. 20–40 vs 16 when missing
Race 100%White
Location 92%41 mi away, same state
TimingFound 7 years after last seen
Height 68%5'5" vs 5'2"
Weight 100%110 lb vs 110 lb
Hair 50%Brown vs Red
75%Possible
Jane Doe — San Francisco, California - unidentified case UP150119
Jane Doe — San Francisco, California
UP150119 • Found May 18, 2025
View case
Sex ✓Female
Age 85%Est. 40–60 vs 16 when missing
Race 100%White
Location 92%41 mi away, same state
TimingFound 48 years after last seen
Height 84%5'4" vs 5'2"
Weight 100%107 lb vs 110 lb
Hair 100%Red vs Red
Eyes 70%Green vs Hazel

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.