A string of murders targeting a pizza chain and its employees led to a nationwide manhunt for a killer bent on revenge.
A biochemist's obsession with a coworker was exposed after a lovers' spat in a hospital parking lot.
Celebrity real-estate broker Linda Stein served New York's elite. When she was found dead, investigators faced a slew of powerful potential suspects.
An assistant biology professor at the University of Alabama in Huntsville shot and killed three colleagues and wounded three others during a faculty meeting.
A prominent cancer researcher was hospitalized for apparent poisoning after his coworker turned lover, a renowned breast cancer researcher, spiked his coffee.
When three hotel workers didn't turn up for their shifts, a bizarre series of discoveries revealed a workplace love triangle.
When entrepreneurial spirit turned two best friends into mortal enemies, one woman ended up on the run.
Shortly after taking a new job, a beloved horse trainer was found murdered in a rural stable in a small seaside English town.
When a mattress factory manager was found gunned down in the shower, investigators had to find out if he was betrayed by a disgruntled worker.














