Monday

Rising rapper Kardone is found shot in his locked apartment. A suspicious 911 call and chilling CCTV footage point to a scorned lover whose jealousy turned deadly.

In 1997, four bodies were found in a Bartow, Florida, factory -- all with close ties to company management. Was it a robbery gone wrong or a premeditated quadruple homicide? Investigation reveals an intricate murder plot and a devious mastermind.