Orange, California shooting: suspect knew the four victims he killed

Aminadab Gasiola Gonzalez was taken to the hospital in critical condition although it was unclear if his wounds were self-inflicted

Details started to emerge on Thursday morning about a mass shooting at an office building in southern California that left four people, including a nine-year-old boy, dead the night before.

Police said the suspect in the shooting in the city of Orange, south of Los Angeles, knew all of the victims through a business and personal relationship". A fifth victim was hospitalized in critical condition.