The First 48

In Dallas, Det. Rick Duggan investigates the murder of a young man shot in the backseat of his friend's car. And in Minneapolis, Sgts. Bruce Folkens and Chris Karakostas must find the person who savagely beat a homeless man to death.

Tucson detectives arrive at the murder scene of a young man gunned down behind an apartment complex. And in Dallas, a birthday party turns violent when a stray bullet from an AK-47 strikes down a teenaged girl.

In Dallas, Detectives Randy Loboda and Scott Sayers are investigating the murder of a 54-year-old family man, gunned down in his home in front of his wife and children. And in Cincinnati, a gunfight in broad daylight ends the life of a 23-year-old man.

In Tucson, detectives investigate the gruesome murder of a 58-year-old woman found naked and dead under a highway overpass. And in Birmingham, a community lives in fear after a teenager is senselessly shot in his apartment complex.

In Minneapolis, a young man is robbed and killed while meeting up with a girl he met earlier on a bus. And in Birmingham, detectives are investigating the murder of a man gunned down outside the city's annual Magic City Classic football game.

In Minneapolis, after a night out with friends, a college student is stabbed to death while getting on his scooter to ride home. And in Miami, detectives investigate the murder of a teenaged boy shot in a residential backyard.

In Louisville, a Sudanese man who fled genocide in Darfur is shot to death while working in his clothing store. And in Birmingham, a young man is shot dead in his home. His girlfriend, also shot multiple times, struggles to survive.

Miami Sgt. Armando Aguilar and Det. Leo Tapanes are assigned the homicide case of a 20-year-old Rastafarian, shot and robbed on Christmas Day.

In Miami, a man is found dead on a residential sidewalk. The investigation, supervised by Sgt. Johnny Herrera, uncovers a tangled plot of false leads and secret lives--the victim's past proves as puzzling as his death.

In Louisville, a 45-year-old man is found gunned down in the snow. Det. Rick Arnold and his team track down a key witness who is forced to chose between her friendship with the suspect and her own freedom.

In Birmingham, a motorcycle club president shot in the head after being run off the road. And in Louisville, Det. Cadwell races against the clock to catch the killer of a mother of seven, strangled to death in her apartment.

In Birmingham, detectives investigate the brutal murder of a young woman shot to death in a park in the middle of the day. In Minneapolis, detectives investigate the murder of a young man beaten and shot during a gunfight in front of a strip club.

When a 21-year-old father is gunned down in a parking lot in broad daylight, Louisville Det. Keith Roberts begins investigating one of the most brazen murders he has ever seen.

In Louisville, a rookie detective is trying to untangle a love triangle that turned deadly. And in Dallas, lead detective Sayers and his team must piece together what happened inside a car that left the driver dead and a second victim critically injured.

In Louisville, a 33-year-old woman collapses in the street after being stabbed multiple times. And in Minneapolis, Sgts. Jerry Wallerich and Gerhard Wehr investigate the murder of a 19-year-old college student, shot down on a residential street.

In Birmingham, Det. Marcel Walker works to unravel the mystery of a 28-year-old man shot in his home. In Miami, Sgt. Ervens Ford and Det. Fabio Sanchez race against the clock to catch the killer of a homeless man found stabbed in a park.