The First 48

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

In Dallas, detectives are investigating the murder of a 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 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 teenager is senselessly shot in his apartment complex.

In Minneapolis, a young man is robbed and killed while meeting up with a girl. And in Birmingham, detectives are investigating the murder of a man gunned down outside a football game.

In Minneapolis, 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.

Miami Sgt. Aguilar and Det. 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 uncovers a tangled plot of false leads and secret lives—the victim's past proves as puzzling as his death.

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.

In Birmingham, detectives investigate the brutal murder of a young woman shot to death. In Minneapolis, detectives investigate the murder of a young man beaten and shot during a gunfight.

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, detectives must piece together what happened inside a car that left the driver dead.

In Louisville, a 33-year-old woman collapses in the street after being stabbed multiple times. And in Minneapolis, detectives investigate the murder of a college student.

In Birmingham, Det. Marcel Walker works to unravel the mystery of a man shot in his home. In Miami, detectives race against the clock to catch the killer of a homeless man found stabbed in a park.