Carriker’s attorneys told the court their client is undergoing mental health treatment and is prepared to move forward with the case. The municipal court judge forwarded the charges to county court for trial.
Prosecutors have said Carriker left a will dated June 23 at his home and a roommate said he appeared agitated and had been wearing a tactical vest around the house in the days before the shooting that killed 20-year-old Lashyd Merritt, 29-year-old Dymire Stanton, 59-year-old Ralph Moralis, and 15-year-old DaJuan Brown.
A fifth shooting victim, Joseph Wamah, 31, was found shot to death a day earlier in Kingsessing.
A 2-year-old boy and a 13-year-old youth were wounded by gunfire and another 2-year-old boy and a woman were injured by shattered glass in the shootings.
Philadelphia police have said Carriker was wearing a ski mask and carrying an AR-15-style rifle when he shot people and cars. When he surrendered in an alley, police found he had two guns, extra magazines and a bulletproof vest.