We revisit three cases with interrogations that could make or break the investigation. First, detectives must outwit a stonewalling suspect following a deadly Tulsa shooting.

In Tulsa, when a man is found shot and dumped on the road, detectives turn to surveillance footage to track down his killer. And in Atlanta, when a new father is gunned down by a stranger in a parking lot, investigators enlist the help of the public.

We revisit three cases from the First 48 archive where a big break makes all the difference in solving a murder. First, detectives uncover shocking evidence in the brutal murder of a Cincinnati grandfather.

Three cases from The First 48 archive that left detectives wondering why long after the case was closed. In Harris County, Texas, investigators are stunned to find an elderly woman gunned down taking groceries from her car.

In Tulsa, a teenager is shot dead, and detectives must uncover the truth behind his roommates 'stories. Also in Tulsa, old habits die hard when a young father gets out of prison and is shot after being drawn back into his old life.

First, a woman in Tulsa faces a terrible choice after her fiance is shot dead by her own son. Then, a tip from a suspect's family member helps unravel a Tucson cab driver's brutal murder.

In Tulsa, an encounter on the street escalates into gunfire, leaving a mother dead. Then, in Dallas, a case of brutal overkill takes detectives by surprise. And in Mobile, a security guard at a bar becomes a target for revenge.

In Miami, when a retired police captain is shot in broad daylight, Miami PD launches a massive investigation that leads them all the way to New Jersey.

We revisit three cases from The First 48 archive that expose the dark and deadly side of love. First, love turns lethal when a Tulsa couple's argument escalates to double murder.