Columbia police say a fourth teen is now charged in connection to a deadly Facebook Marketplace robbery scheme.
17-year-old Mikel Jones was certified as an adult Tuesday, facing second-degree murder, robbery and armed criminal action charges in the January shooting death of Michael Burke.
Investigators say Jones shot Burke during an iPhone sale at his home, while three other suspects waited in a getaway car.
Those three adults were indicted earlier this year.
Court documents also show Jones had prior referrals to juvenile authorities.
He is now being held in the Boone County Jail without bond.