Malloy and Reed are called to provide backup to of all people Mac, who happened upon a B&E in progress. Mac requests Malloy to be the accompanying officer in transporting the perpetrator, Victor Lamson, back to the station, while Reed secures the crime scene. Both Mac and Malloy's friendly attitude change as they, while driving to the station, hit an elderly pedestrian. Both Mac and Malloy know that the pedestrian came out from between two parked cars into traffic, whereas the three independent witnesses on the street all state that the pedestrian was in the pedestrian crosswalk, thus had the right of way, and that Mac was speeding. Lamson, who knows that Mac and Malloy are telling the truth, will not corroborate their story unless they let him go, which they both refuse. Internal Affairs does an investigation. Mac comes to the realization that he could be in real trouble and lose his job, and that Malloy will also have a rough ride if Mac is found guilty. They have to do some digging to see if the victim, who eventually dies from her injuries, and/or the witnesses have ulterior motives in lying about what they saw. Malloy also believes there may be another witness out there that can and will tell the truth. Meanwhile, Lamson ends up being a victim himself when friends of his realize that because he is in jail, his apartment filled with stolen goods is just ripe for the picking.