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Donald Marcelino Alvarez (Marc) Vallecillo

The person at the center of this case

Donald Marcelino Alvarez (Marc) Vallecillo

Case
#2592
SourceNamus MissingUpdated Jun 23, 2026
Santa Monica Police Department
Missing Person · Open
32 years waiting · since 1994

Missing Person: Donald Marcelino Alvarez (Marc) Vallecillo

Justice for Donald Marcelino Alvarez (Marc) Vallecillo — the trail went cold in 1994, but the truth hasn't.

Start here

Key leads to think about

👤
person
Lead #1

Who was Donald's former roommate and what was their relationship? Why did they pick him up that day?

👤
person
Lead #2

Who was the second unidentified male who accompanied the former roommate?

👁️
witness
Lead #3

Did anyone witness the pickup or see the vehicle that Donald left in?

Donald Marcelino Alvarez (Marc) Vallecillo, a 32-year-old Hispanic male, disappeared in May 1994 after being picked up from his temporary residence in Santa Monica by his former roommate and another unidentified male. The circumstances of his disappearance remain unclear, with no confirmed sightings or contact since that day over three decades ago. Despite the passage of time, investigators continue to seek information about the two men who picked him up and any details that might explain what happened to Donald.

Case
#2592
SourceNamus MissingUpdated Jun 23, 2026
Santa Monica Police Department

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More leads to consider

Beyond the top three above — each detail below could be the thread that pulls this case open.

🚗
vehicle
Lead #4

What vehicle was used for the pickup? What direction did they travel?

💡
clue
Lead #5

Why did Donald move out of his apartment and return to temporary family housing in May 1994?

Have information about any of these leads?

Even the smallest detail could be the key to solving this case.

Official wording

Source Narrative

NamUs case MP23421. Missing person: Donald Marcelino Alvarez (Marc) Vallecillo.

Last known contact: 1994-05-30 in Santa Monica, Los Angeles, CA. Circumstances: Donald was temporarily living with his family after moving out of an apartment in Los Angeles.

Donald's unidentified former roommate and another unidentified male picked Donald up from his temporary residence on an unknown date in May 1994. They drove away and Donald has not been seen since.

Demographics: 32 years, Male, Hispanic / Latino. Physical description: 5 ft 8 in, 145 lbs, hair: Brown, eyes: Brown.

Clothing and accessories: Clothing: White t-shirt, black leather jacket, gray jeans (described as denim trousers); Eyewear: None; Footwear: Unknown color tennis shoes; Jewelry: None. Investigating agency: Santa Monica Police Department | 99-15322.

Timeline of Events

👁️
1994-05-30

Last Known Contact

Donald was picked up from his temporary family residence in Santa Monica by his former roommate and another unidentified male. He has not been seen since.

Key Locations
Interactive map showing important locations related to this case

Case Information

Incident:May 30, 1994
Last Updated:June 24, 2026

Have Information?

Any information, no matter how small, could be crucial to solving this case.

Phone: 3104588491
You can remain anonymous

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Case Information

Incident:May 30, 1994
Last Updated:June 24, 2026

Have Information?

Any information, no matter how small, could be crucial to solving this case.

Phone: 3104588491
You can remain anonymous