The person at the center of this case
Alfredo Grifaldo Diaz
Missing Person · Open
46 years waiting · since 1980
Missing Person: Alfredo Grifaldo Diaz
Justice for Alfredo Grifaldo Diaz — the trail went cold in 1980, but the truth hasn't.
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Key leads to think about
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suspect
Lead #1What was the nature of the criminal investigation that detectives were conducting when Diaz disappeared?
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witness
Lead #2Were there any witnesses to Diaz's disappearance or his activities on August 13, 1980?
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clue
Lead #3Why did detectives lose contact with Diaz during their investigation, and what circumstances surrounded his disappearance?
Alfredo Grifaldo Diaz, a 23-year-old Hispanic male, disappeared in McAllen, Texas on August 13, 1980, while detectives were conducting a criminal investigation. He has had no contact with family for over 45 years, and his whereabouts remain completely unknown. Anyone with information about Diaz's disappearance or current location is urged to contact the McAllen 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.
👤
person
Lead #4Has any credible information about Diaz's fate or location surfaced in the 45+ years since his disappearance?
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 MP150712. Missing person: Alfredo Grifaldo Diaz.
Last known contact: 1980-08-13 in McAllen, Hidalgo, TX. Circumstances: Detectives were unable to locate Alfredo Diaz during the course of their criminal investigation in 1980.
Diaz has not had contact with family for over 45 years. Demographics: 23 years, Male, Hispanic / Latino.
Physical description: 5 ft 5 in, 150 lbs, hair: Black, eyes: Brown. Investigating agency: McAllen Police Department | 1980-19429 | 2025-08-18.
Timeline of Events
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1980-08-13
Last Known Contact
Alfredo Grifaldo Diaz last had contact with family in McAllen, Texas. He was being sought by detectives during a criminal investigation at the time.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:August 13, 1980
Last Updated:September 29, 2026
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Any information, no matter how small, could be crucial to solving this case.
Phone: 9566812000
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Case Information
Incident:August 13, 1980
Last Updated:September 29, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9566812000
You can remain anonymous