The person at the center of this case
Donald Marcelino Alvarez (Marc) Vallecillo
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.
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Key leads to think about
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person
Lead #1Who was Donald's former roommate and what was their relationship? Why did they pick him up that day?
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person
Lead #2Who was the second unidentified male who accompanied the former roommate?
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witness
Lead #3Did 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.
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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.
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vehicle
Lead #4What vehicle was used for the pickup? What direction did they travel?
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clue
Lead #5Why did Donald move out of his apartment and return to temporary family housing in May 1994?
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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
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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
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Any information, no matter how small, could be crucial to solving this case.
Phone: 3104588491
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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