First 48: Burden of Proof / Backfire

In Detroit, Lead Detective Lance Sullivan investigates the murder of a woman shot in her home. Police catch their suspect driving the victim's car, but don't have enough to charge him. Now Sullivan must race to collect evidence for a murder warrant before his suspect can post bail. And in Cincinnati, a young man is found shot dead in a parking lot after he and a friend tried to rob a street vendor. Detective Colin Vaughn and his team identify the suspect, but still need to find the second robber to close the case.