On July 5, the Harris brothers happened upon John Mayeski and Michael Baker, both 16, sitting in a green Ford LTD eating cheeseburgers in a supermarket parking lot in Mira Mesa. Mayeski and Baker were best friends who had planned to spend the day fishing to celebrate Mayeski's newly acquired driver's license. Robert Harris commandeered Mayeski's car and ordered him to drive to Miramar Lake, with Daniel Harris following in another vehicle. Robert Harris told the boys that they would be using the vehicle to rob a bank, but that no one would be hurt. At Miramar Lake, the Harris brothers ordered the boys to kneel, whereupon the boys began to pray. Robert told the boys to "Quit crying, and die like men", then shot both boys multiple times. The Harris brothers then returned to Robert's Mira Mesa home and allegedly finished the victims' half-eaten cheeseburgers while Robert boasted about the killings.