Unraveling Glenn Sandler's sinister murder-for-hire plot would require a brazen undercover operation, faked drug run and staged hit. 

Courtney Copeland's March 2016 murder ended the ambitious salesman's dreams, but it also ignited a powerful mission for his mother to find his killer. 

Four years after Barbara Jean Horn was found dead, stuffed into a cardboard box, her parents were relieved when an arrest in the case was finally made, but the heartbreaking case was far from over.

Realtor Beverly Carter believed she was meeting a married couple for one last showing at a rural Arkansas property, but the meeting would ultimately cost the 50-year-old her life. 

Maurizio Gucci, who hailed from one of fashion's most famous families, was gunned down on the steps of his office in 1995. 

Ron Baker, an astrophysics major at UCLA, was found in 1990 with his throat slit just days after the summer solstice in a dark tunnel ominously referred to by locals as the “Manson Tunnel.”

For more than a decade, Abe Anhang was determined to find justice for his son Adam, who was stabbed to death on the cobblestone streets of Old San Juan in 2005.

Brooke Wilberger had her life in front of her when she vanished from the apartment complex where she was working during the summer of 2004, leaving her anguished family desperately searching for answers. 

Judy Gough's daughter Kimberly was just 12 years old when her mother coldly asked her “How would you like it if Lloyd was gone?” 

Less than a year before her death, Theresa Insana's wedding was suddenly called off by her fiancé, who quickly moved on with a new love interest.