At about 10 p.m. that evening a teenager was sitting on the porch talking on a cell phone when Harkness and and as yet unidentified accomplice appeared to be “patrolling” for a robbery victim, Guzda said. Guzda said the entire robbery was caught on “great video,” which even showed Harkness’ accomplice strike the teen in the face with his pistol after the victim gave up a small amount of cash, his wallet and cell phone.