Authorities say 25-year-old Jose Ramirez, a known Norteno gang member, shot Aguiniga multiple times in the driveway of Aguiniga's cousin's home in Armona.
RELATED: 25-year-old man shot and killed in Armona, police believe it was gang-related
Aguiniga had been visiting his cousin, drinking in the garage, when Ramirez approached the house, according to detectives.
Aguiniga's cousin told investigators Ramirez had called out for David outside the garage before shooting him several times. He later died at the hospital from his injuries.