Shortly after a young nurse ends up beaten and shot to death in her apartment, her lover's wife reveals her knowledge about the affair, yet it takes nearly 40 years to match DNA evidence found at the crime scene to implicate the man behind it all.

The sporadic appearance of brutalized mannequins and six different incidents of murder and assault, terrorizes residents of Elkridge, Maryland for 13 years until a DNA match implicates a local suspect as the killer.

When a 77-year-old woman is found raped and murdered in her vandalized house, a wrongfully convicted man is behind bars for 23 years until DNA analysis emerges implicating the real killer.

When a popular high school cheerleader is abducted and found stabbed to death in a water retention tank, it takes several years until the murderer makes the mistake of implicating himself as a new victim giving the authorities the evidence needed to pin him to the brutal killing.