San Angelo detectives identify suspect in Arden Ridge homicide, suspected arson investigation


Investigators with the San Angelo Police Department’s Criminal Investigations Division have obtained an Arrest Warrant for 35-year-old Sergio Eduardo Coyac-Aguilar in connection to the July 2, 2018 homicide and suspected arson investigation at the Arden Ridge Apartments.

Coyac-Aguilar, a Mexican national who was working in San Angelo under a false name, is believed to have murdered his co-worker, 59-year-old Miguel Mendez, by beating him to death.

Autopsy results indicate Mendez died from blunt force trauma to the head. Justice of the Peace J.P. McGuire declared the death a homicide due to assault. It is believed that Coyac-Agular set fire to the apartment to conceal the crime scene.

Investigators developed Coyac-Agular as a person of interest during the initial field investigation. However, his positive identification was hindered due to Coyac-Agular’s use of a false name. Through investigation it was learned Coyac-Agular obtained work in the United States under the guise of falsified permanent residency status and with a fictitious social security card.

It is believed Coyac-Agular fled to Mexico after the murder. If you have information about Coyac-Agular’s whereabouts, please contact the San Angelo Police Department’s Criminal Investigations Division at (325) 657-4264. To remain anonymous, tip online at or by text: text TIP SAPD to 888777 and follow the prompts.

Information courtesy of the San Angelo Police Department

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