The First 48

In Minneapolis, just days before Christmas, detectives are called to the murder of a young woman, found strangled in a partially burned car. As they fight against the clock and a snowstorm, the team soon realizes that the killer may be close.

In Memphis, Sgt. Bart Ragland must find out who shot and robbed a family man. In Tucson, Det. Bill Hanson hunts two suspects who allegedly gunned down a local high school student as he and his friends walked home from the mall.

In Miami, detectives investigate the murder of two men savagely gunned down in the middle of a residential street. And in Cincinnati, Det. Hilbert and his team search for the suspect in a shooting that left one man dead and another wounded.

In Tucson, detectives are called to investigate the robbery/homicide of 27-year-old cab driver and father-to-be Timothy Royce. In what appears to be a brutal and random crime with no leads, the case takes a turn when detectives get a surprise tip.

When a young man is gunned down outside a Cincinnati nightclub, witnesses see another young man running from the scene. In Miami, a pair of one-year-old twins cry helplessly in the back of a black SUV -- their mother slumped over in the driver's seat.

In Memphis, Lt. Armstrong and his team respond to Memphis's worst mass murder in more than 15 years, where they find four adults and two children dead. Armstrong's entire team is called to action as they scramble for leads.

In Cincinnati, Detectives Keith Witherell and Bill Hilbert attempt to crack the code of silence.

In Dallas, Det. Robert Arredondo and his team investigate the murder of a 22-year-old man tied up and shot along with two friends during a robbery. Armed with only the street names of his two suspects, Arredondo must identify them and track them down.

In Dallas, Detectives Scott Sayers and Ken Penrod are investigating a home invasion that left a young man dead.

In Memphis, the homicide team investigate the high-profile murder of a University of Memphis college football player found shot in his car near campus. In Tucson, detectives investigate the double murder of a married couple shot in their home.

In Memphis, Sgt. Debo Carson and her team investigate the murder of a man shot dead outside of his house. The case takes a turn when a man investigators believe to be a witness becomes a suspect. In Dallas, a carjacking spree leaves one man dead.

In Memphis, Sgt. Connie Justice investigates the homicide of a man found bludgeoned to death in his apartment. And in Minneapolis, detectives investigate the murder of a young man shot on the street after a car accident.

In Detroit, detectives investigate a triple shooting that left a young mother and her friend dead. And in Dallas, a man is intentionally run down and killed by someone in a car.

In Tucson, a grandfather is shot after answering a knock at his front door. The suspect's getaway car crashes a few blocks from the crime scene and the suspect flees. And in Cincinnati, an elderly man is found strangled to death in his bedroom.

In Minneapolis, Sergeants Bruce Folkens and Chris Karakostas work against the clock to solve the murder of an unknown homeless man, bludgeoned to death on the edge of the Mississippi Riverbank.

In Cincinnati, detectives investigate the murder of a 56-year-old man brutally beaten to death in the stairwell of his apartment building. In Dallas, the homicide unit investigate the murder of a 28-year-old singer found shot in his car.

In Dallas, a man is found dead in a vacant lota "with no leads, witnesses or motive. And in Minneapolis, detectives are working the violent stabbings of a mother and her 10-year-old son.

In Dallas, two teenaged boys are shot outside a nightclub. As Det. Eddie Ibarra puts the pieces of the case together, he is temporarily pulled away to assist in the search of woman who has been missing for six days.

Now that some of our strongest cases have been adjudicated, we can take viewers inside the powerful and dramatic events that unfolded after the arrest.

Now that some of our strongest cases have been adjudicated, we can take viewers inside the powerful and dramatic events that unfolded after the arrest, up to the conviction.