Wednesday, officers arrested Gilbert Ruiz also in connection with the murder.
They say he drove a getaway car in the killing 27 year old Rudolfo Hernandez.
Police found Hernandez shot in the chest at a home on Almond Avenue.
He was rushed to the hospital, but later died.
Hernandez' family told investigators he had recently dropped out of a gang and was trying to turn his life around.
It's still unclear whether the murder was gang-related.