The First 48

In Louisville, a 45-year-old man is found gunned down in the snow.

In Birmingham, Det. Chris Anderson works to unravel the mystery of a motorcycle club president shot in the head after being run off the road.

In Louisville, rookie detective Kristen Downs is trying to untangle a love triangle that turned deadly.

In Birmingham, Det. Marcel Walker works to unravel the mystery of a 28-year-old man shot in his home.

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 33-year-old woman collapses in the street after being stabbed multiple times.

In Birmingham, Detective Chris Anderson and the homicide team investigate the brutal murder of a young woman.

In Louisville, a community is outraged when a married couple is gunned down at home in front of their two young children.

In Harris County, Sgt. Roger Wedgeworth investigates the gruesome murder of a homeless man found stabbed to death along Interstate 45.

In Birmingham, Detective Chris Anderson returns to his childhood neighborhood to investigate the murder of a man killed over ten pounds of marijuana.

In Miami, Det. Rolando Garcia is investigating the shooting death of a local homeless man, known for looking after his fellow transient friends.

In Louisville, Det. Corey Cadwell and his team investigate the murder of a 28-year-old father stabbed to death while working his shift in a smoke shop.

When dismembered body parts are found floating in Miami's Biscayne Bay, Det. Orlando Silva and the Miami homicide team work around the clock.

In Louisville, a murder hits close to home when Detective Rick Arnold learns that the victim of his most recent homicide case is the brother of a good friend.

In Louisville, Det. Carl Payne and the homicide team investigate the murder of a young man shot to death in the middle of the street in broad daylight.

In Louisville, a sleeping family awakens to a barrage of bullets from a machine gun, leaving two young boys injured and a teenager dead.