Investigators said an argument escalated to a physical altercation between several females. The apartment manager and Subacz stepped in to try to calm the situation and were assaulted by three male suspects. One of the suspects then shot Subacz.
Deputies said the three men ran away and have not yet been arrested.
Anyone with information is asked to call the Homicide Detail at (909) 387-3589 or WETIP at (800) 78-CRIME (27463).