Later that evening, the gang returned to Pacifica. Around 9:30 p.m., two members of the Joe Boys, Peter Cheung and Dana Yu were asked to steal a four-door car, which would facilitate entry and exit for a quick getaway; they returned shortly afterward with a blue Dodge Dart and parked it in the home's driveway. The gang members retrieved the guns from the closet after the homeowners returned and went to sleep. At 2:00 a.m., Pacific Standard Time on Sunday, September 4, 1977, Tom Yu received a phone call from Carlos Jon that members of the rival Wah Ching gang, including Michael "Hot Dog" Louie, one of its leaders, were present at the Golden Dragon restaurant in San Francisco's Chinatown (Chinese: 三藩市華埠金龍大酒樓).