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 #1Why was Alfredo Diaz the subject of a criminal investigation in 1980, and could this be connected to his disappearance?
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witness
Lead #2Were there witnesses to Alfredo's activities or whereabouts on August 13, 1980 or in the days following?
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clue
Lead #3What specific criminal investigation was underway when Alfredo disappeared, and are case files still available?
Alfredo Grifaldo Diaz, a 23-year-old Hispanic male, disappeared in McAllen, Texas on August 13, 1980, during a criminal investigation by local detectives. He has had no contact with his family for over 45 years, and the circumstances surrounding his disappearance remain unclear. Anyone with information about Alfredo's whereabouts or what happened to him is urged to contact the McAllen Police Department.
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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:July 31, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9566812000
You can remain anonymous
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Case Information
Incident:August 13, 1980
Last Updated:July 31, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 9566812000
You can remain anonymous