When a hospital employee is found mysteriously dead on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

After a successful Korean-American business owner is killed during a home invasion, detectives believe his murder could be tied to a string of Philly crimes against businesses, until they uncover that the mastermind is someone much closer to home.

A beloved matriarch is found viciously murdered in her suburban Philadelphia home; detectives investigate the victim's inner circle and uncover a killer hidden in plain sight.

A respected and beloved chiropractor is found bludgeoned to death in his home outside Philadelphia. Investigators take a hard look at those closest to him, but soon learn the murderer is someone they least expect.

A young woman is found strangled and posed in the notorious Kensington neighborhood. When more victims are found assaulted in an eerily similar fashion, detectives race against the clock to find the perpetrator before he strikes again.

When a veteran police officer is gunned down in the line of duty, detectives make it their mission to bring his killer to justice. While investigating in a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

The stabbing murder of a 20-year-old woman in the suburbs of Philadelphia stymies detectives until a series of eerily similar murders six years later reveals a killer that has been hiding in plain sight all along.

When a police officer discovers a dead body in a taxi, detectives rely on surveillance footage from across Philly to piece together the mystery of who committed the murder, and the twisted reason why.

The violent murder of a young newlywed in the outskirts of Philadelphia confounds investigators for decades until the perseverance of detectives, combined with new technology, reveals her killer was closer than anyone anticipated.

When a beloved North Philadelphia school teacher is ambushed in a Dunkin' Donuts drive-thru, detectives uncover a deadly plot involving jealousy, deceit and revenge.

The investigation of a bridal shop supervisor's violent murder leads detectives to Philly's music scene to reveal a hit list, an ultimatum and an abusive musical mastermind.

A secretary is found shot in the head inside a suburban Philadelphia church, putting the close-knit congregation on edge; as gossip and theories swirl, detectives unfold a strange tale of jealousy.