A frantic woman calls 911 saying an intruder just entered her home and shot her husband. When the victim -- a local fire chief -- dies from his injuries, the first responder community works tirelessly to find out who killed one of their own.

When two girls from neighboring counties disappear and are found murdered, one family receives multiple taunting calls from the kidnapper. Investigators work to track him down and succeed when they discover a clue delivered by the killer himself.

A woman calls 911 saying her husband is exchanging gunfire with intruders, and her toddler is outside with them. Police find the boy safe, though the husband is dead and a ranch hand injured. The search for suspects unearths a plot rooted in betrayal.

A dying man calls 911 saying he's been shot in the heart, and his son has also been shot dead. The shooter escapes into the darkness, and as detectives investigate, they navigate a complex group of suspects to uncover a tangled web of rage and revenge.

Two distraught women call 911 when they discover their sister brutally murdered. Soon, detectives uncover a stunning surprise and struggle to find a killer whose self-hatred drove him to commit the ultimate sin, in a precedent-setting case.

In a distressing 911 call, a woman reports someone is breaking into her home. Then the dispatcher hears a scream and a gunshot. Soon, investigators connect the case to a previous home invasion and must solve the crimes before another victim falls.

A young father calls 911, gasping that he accidentally shot himself while working on a farm. Police race to find him and keep him on the line. They hear a second shot and reveal an astonishing twist: this shooting was no accident.

A woman calls 911, whispering that intruders broke into her home, bound her and her son, and attacked her husband. When police arrive to find the husband dead and the killers gone, investigators struggle to expose the twisted mastermind behind the crime.

A traumatized man calls 911 after seeing his friend shot and killed right before his eyes. With a surprisingly long list of suspects, investigators must sort through layers of lies, jealousy and mistrust until they finally uncover the shooter.

A man calls 911 claiming he found his ex-girlfriend dead, but his behavior on the call leads police to wonder if he could be involved. Investigators tirelessly gather evidence to convict a killer whose unchecked rage left a young son motherless.

A series of bizarre 911 calls come in to police in two cities from a serial killer confessing his crimes. The man becomes known as the Weepy Voiced Killer, due to his strange, whining voice--and many young women will fall before he can be stopped.

With the help of a neighbor, an injured woman calls 911 saying an intruder broke into her boyfriend's home and shot them both. Police respond to find the boyfriend executed, and soon they must decipher strange evidence left behind to identify the killer.

A woman calls 911, saying she's found her son unconscious in his home. When police arrive, they realize he's dead: his hands are bound and he's been strangled. At first it seems like a burglary gone bad, but cops soon discover this death was personal.

In a harrowing call, a terrified woman tries to give police clues: there's a gun, she's near a river, and her kids are at risk. After police find her body in the river, they learn a stomach-churning truth about a killer who's been a predator for years.