Southern California authorities have filed murder and attempted murder charges against the suspect in last week's shooting rampage at a rural Roman Catholic Korean retreat.
The suspect confessed to the shooting during an interview Friday, authorities told the North County Times.
Chong also told investigators that he purchased the .32-caliber revolver in December and practiced using it in the hills surrounding the retreat east of Temecula, Riverside County sheriff's Sgt. Michael Lujan said.
Investigators say Chong fatally shot a woman at the Kkottongnae Retreat Camp on April 7 and wounded her husband before another couple disarmed him in a violent struggle after he tried to shoot them as well.
Chong suffered severe head trauma in the fight and was initially unconscious.
An arraignment is scheduled for Wednesday afternoon.