Missing Witness / Who's Knocking

In Miami, a man is gunned down at close range in broad daylight. Detective Freddie Ponce and his team follow a blood trail at the scene to an apartment complex, where they believe the suspect is hiding out. In Cincinnati, Detectives Doug Lindle and Matthew Thompson investigate the murder of a man shot outside his apartment. They learn that moments before the murder, the victim received a house call from a stranger. They must uncover the identity of the unexpected visitor to find the killer.