To successfully pass the mission, catch both perps and collect evidence. To earn a commendation, catch both perps within 4 minutes and collect evidence. You'll need to go after the red car first. From your starting position turn around and take a right down the alley. Keep going straight and stop when the alley hits the main road. The bank robber will drive by in a second, when he does tail him and disable his vehicle. After that's done check your map for the location of the blue van and do the same to him.