A beloved father of three is gunned down outside his home during a robbery gone wrong. Investigators catch a lucky break with a surprise piece of evidence.

In two cases in Louisville, Kentucky, detectives arrested suspects whose actions were caught on videotape? But will the surveillance tapes help the prosecutor's case--or help the defendants walk free?

After an unidentified man's stabbed body is found in a vacant Dallas, Texas apartment, two suspects both admit to setting up the man for robbery--and blame each other for the murder.

A woman's dismembered body is found beneath an overpass in Tucson, Arizona. Then, a weekend getaway in Dallas, Texas turns deadly when a woman is shot to death by her cousin's boyfriend.

In Miami, Florida, Pedro Roteta is stabbed in the middle of the street and left to die. And in Texas, a man is stabbed to death in an alley and the sole suspect disappears over the Mexican border.

A brutal shooting eaves a single mom mourning her only son. And, a motorist calls 911 in the middle of the night, but when responders arrive, they find the caller shot dead.

When a popular local celebrity in Louisville is murdered during a drug deal, homicide detectives Brenda Wescott and John Lesher search for his killer.

Lt. Caroline Mason revisits the 2007 homicide of a 19-year-old man shot to death. And, a prosecutor's case comes close to collapse.

In Miami, Detective Freddie Ponce arrests a man who tortured and killed his childhood friend. In Birmingham, a young mother is killed in front of her children.

Louisville resident Billy Wagner was killed in the street by a single bullet to the back of the head. Det. Rick Arnold charged 20-year-old Gary Lindsey with murder, but the story was far from over.

John Craig Froelich, II was shot and killed. Without forensic evidence, prosecutor Terrence Windham had to rely on three eyewitnesses who all had credibility issues.

In Memphis, a 79-year-old man, beloved in his neighborhood, is shot dead. Also in Memphis, a young female tattoo artist is killed in her shop. The alleged shooter faces the death penalty.

In 2008, a Darfurian immigrant was shot and killed in his store during a robbery in Louisville. When one defendant turns on the other two, the trial becomes every man for himself.