Detectives in Tulsa, Okla., have only one witness -- a 12-year-old girl -- to a domestic dispute that has escalated to a double homicide; at trial, their case hangs on whether or not she will be able to testify.

Evidence at the crime scene leads detectives in Mobile, Ind., to believe a young victim was murdered by two gunmen; a high-stakes trial leaves the jury wrestling with the question of whether one of the suspects could be found not guilty.

When two boys find their mother in the back of her car, Tulsa detectives turn to her family for help catching her killer. But at the defendant's trial, his explosive testimony leaves the prosecution's case hanging on one key piece of evidence.

Gwinnett County detectives investigate the murder of an innocent fifteen-year-old, caught up in a petty crime. But how will the prosecution take on a witness who claims the shooter acted in self-defense?

When Gwinnett County detectives find a mother stabbed to death, the job of identifying her killer falls to her young son; testifying at trial could be difficult for the child, putting the prosecution's case at risk.

A mother goes missing after blowing millions at the casino; at trial, the DA and detective take a gamble of their own to bring her killer to justice.

When a Tulsa man is killed by a bullet to the head, detectives discover guns hidden in the garage next door. The neighbour's role becomes a question in a case of cousin against cousin.

When a Tulsa father of two is shot just blocks from his ex-girlfriend's house, detectives have to decide which two persons of interest should be charged with his murder; a conflicting account challenges the result of the court case.

Tulsa detectives believe the victim of a shooting was a good Samaritan who'd been robbed; at trial, the jury must decide if his killer actually acted in fear of his own life.

In Tulsa, a rookie detective is pushed to the brink searching for a beloved man who ultimately turns up brutally murdered. After a grinding two-year investigation, bringing the killer to justice could hang on the testimony of a jailhouse informan.

After a man is gunned down at an after-hours club, investigators and the prosecutor are left with no witnesses who are willing to say they saw the shooting; that leaves the case hanging on the defendant's claim of self-defense.

A massive, gang-related melee outside a nightclub leaves Gwinnett County detectives struggling to identify just who shot a young murder victim. And the death of one of the witnesses makes that challenge even harder for prosecutors.