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.
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.
In-depth interviews, rare archival footage and cinematic recreations show how some of the most iconic first ladies' achievements shaped history.
Explore the cultural and political milestones of the 2000s, including tech triumphs, the war on terror, Barack Obama's election, the financial crisis and more.
From the space race and Cold War to civil rights and more, this series explores how the 1960s shaped our history.
What Happened to America's Mayor? asks how the man considered a hero in the aftermath of 9/11 became an architect of Donald Trump's election conspiracies. This series bears witness to Rudy Giuliani's operatic life of victories and defeats.