The First 48

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. Bill Hanson and his team hope that clues from the car will lead them to the killers.

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 Memphis Sgt. Eric Freeman and the homicide team investigate the high-profile murder of a University of Memphis college football player found shot in his car near the university campus.

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

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

In Cincinnati, Detectives Keith Witherell and Bill Hilbert attempt to crack the code of silence surrounding the death of a 28-year-old man gunned down on Main Street.

In Memphis, Lt. Toney 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.

When a young man is gunned down outside a Cincinnati nightclub, witnesses see another young man running from the scene. Detectives Doug Lindle and Matt Thompson hope one of their witnesses can identify the shooter and help them catch a killer on the run.

In Tucson, Detectives Jennifer Whitfield and Mike Carroll are called to investigate the robbery/homicide of 27-year-old cab driver and father-to-be Timothy Royce.

In Miami, Sgt. Louis Melancon and Det. Carlos Castellanos investigate the murder of two men savagely gunned down in the middle of a residential street. Detectives learn that a roommate of the two victim's is missing.

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

In Minneapolis, just days before Christmas, Sgt. Rick Zimmerman and Sgt. Tammy Diedrich are called to the murder of a young woman, found strangled in a partially burned car.

In Memphis, Sergeants Mundy Quinn and Kevin Lundy set up a sting to catch the victim's killer. And in Miami, Detective Manny Castillo and Sgt. Juan Herrera are called to a brazen execution.

In Tucson, a young man is found shot to death on the street. Detectives Bill Hanson and Mike Carroll follow two clues that could lead to a suspect.

In Miami, Detective Carlos Castellanos is working the homicide case of a man found dead in a motel bathroom, the victim of an apparent robbery.

In Dallas, homicide Detectives Rick Duggan and Ken Penrod investigate the shooting of young man left in the trunk of an abandoned car.

In Memphis, Sgt. Caroline Mason takes on the murder case of a 78-year-old man shot outside his home. The outraged community quickly helps apprehends the two young suspects, but getting them to talk proves more difficult.

In Memphis, a man who fled the war in Bosnia is found shot dead in his truck. A surveillance video could lead Sgt. Joe Stark and his team to their suspects.

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.

In Cincinnati, Ohio a children's Peace Bowl football tournament is interrupted by gunfire, leaving a teenager dead. With no leads, Detectives Greg Gehring and Kurt Ballman hope a witness will come forward to lead them to a suspect. And in Dallas, Texas Detectives Robert Quirk and PE Jones must find who robbed and shot a popular high school basketball coach.

Cincinnati Homicide Detective Kurt Ballman investigates a brutal beating death in the close-knit East End neighborhood.

In Miami, Detective Ervens Ford is called to a shooting in a Little Haiti cafe. Witnesses say it was a robbery gone bad. But just as Ford and his team close in on their suspects, the team gets assigned to a second homicide investigation.

In Memphis, Sergeant Connie Justice investigates the murder of a 32-year-old tattoo artist shot to death during a robbery.