Police say 36-year-old Mustafa Ali executed the two retired Philadelphia police officers without saying a word.
Ali's preliminary hearing on Wednesday included testimony from the armored car's driver, who was the only survivor of the Oct. 4 shooting outside the Wachovia Bank.
Seventy-year-old Joseph Walczak says the shooter walked up as the ATM was being serviced and began firing without warning.
The victims, 65-year-old William Widmaier and 54-year-old Joseph Alullo, were friends from their days working together on the police force.
