When a partially torched body of a prostitute is discovered, police must work quickly to determine the Jane Doe's identity.

Plus, Sergeant Joann Kinney races against time to find two shooting victims who may still be alive.

For homicide detectives, the clock starts ticking the moment they are called. Their chance of solving a case is cut in half if they don't get a lead in "The First 48".

Follow detectives during these critical hours as they race against time to find the suspect.