Long was also convicted on a charge of conspiracy to commit robbery. He faces life in prison plus 10 years when he is sentenced Dec. 19.
Co-defendant Davion Pollard is awaiting trial on a murder charge. A third defendant, Sean Austin Anderson, pleaded guilty to a conspiracy charge and received 10 years in prison plus 10 years for violating his probation in an unrelated case. A fourth defendant, Chase Devon Calton, pleaded guilty to a murder charge and was sentenced as a youthful offender because he was 14 when Clark was killed.
Calton could be sentenced to prison for life if he fails to complete a treatment program administered by the Office of Juvenile Affairs.