Vengeance: Killer Coworkers

An executive, who had come into the office on a Saturday to catch up on work, was strangled to death by a coworker who wasn't supposed to be in the building.

When a mattress factory manager is found gunned down in the shower, investigators must find out if he was betrayed by a disgruntled worker.

Shortly after taking a new job, a beloved horse trainer is found murdered in a rural stable in a small seaside English town.

When entrepreneurial spirit turned two best friends into mortal enemies, one woman ended up on the run.

When three hotel workers didn't turn up for their shifts, a bizarre series of discoveries reveals a workplace love triangle.

A prominent cancer researcher was hospitalized for apparent poisoning after his coworker-turned-lover, a renowned breast cancer researcher, spiked his coffee.

An assistant biology professor at the University of Alabama in Huntsville shot and killed three colleagues and wounded three others during a faculty meeting.

Celebrity real-estate broker Linda Stein served New York's elite. When she was found dead, investigators faced a slew of powerful potential suspects.

A biochemist's obsession with a coworker was exposed after a lovers' spat in a hospital parking lot.

A string of murders targeting a pizza chain and its employees leads to a nationwide manhunt for a killer bent on revenge.