Pasadena police were called to the complex located in the area of South Richey Street and West Jackson Drive.
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A neighbor found 34-year-old Luis Reyes dead, with multiple stab wounds to his upper body, according to police.
Police didn't immediately disclose a motive.
Pasadena police are looking for three persons of interest associated with the crime, pictured above.
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Anyone who may be able to identify these individuals or have information on this case is asked to contact Detective S. Mata at 713-475-7878 or Crime Stoppers at 713-222-TIPS (8477).
No one is in custody, as of Monday afternoon.
A relative told ABC13 Reyes was a construction worker and lived at the complex with friends.
"He was always a happy go-lucky guy, never had a problem with anyone that I know of. He never had an issue with anyone.," the relative said.