Between 1978-1988, seven women are brutally stabbed and dumped in the woods of the Connecticut River Valley. Phelps seeks answers from a woman who survived the serial killer's attack and may be able to identify a new person of interest in the case.

What kind of serial killer removes his victims’ shoes and socks, then lays the bodies facing east? Phelps heads to Atlantic City to investigate the 2006 murder of four sex workers to see if they are connected to a breaking case on Long Island.

From 1976-77, a pedophile abducted and murdered four children from affluent Detroit neighborhoods. Phelps travels to the dark side of suburbia to ask: What kind of monster bathes, cleans and dresses his victims in fresh clothes after he kills them?

Between 2003 and 2007, five down-and-out women go missing in Worcester, MA. Their remains are found in wooded areas outside the city. Phelps tracks the hunter, following the trail of evidence.

From 1971-73, three little girls were snatched up, violated and murdered. They all shared something else--their first and last names started with the same letter. Phelps travels to Rochester, NY to search for answers in a town that won’t let go.

Phelps travels to the Deep South to investigate the murder of 8 girls over 4 years. But a maverick private investigator, multiple persons of interest and rumors of police corruption make the case murkier than a Louisiana bayou.

From 1996-98, someone terrorized the elderly residents of Columbus, MS, brutally killing 5 senior citizens in their homes. But local law enforcement and a secret source have Phelps and Kelly wondering if they're looking at a serial killer.

Phelps and Kelly investigate the 1982 murder of a New Jersey woman, Jane Goodwin. Was it a serial killer responsible for similar murders in Connecticut and New Jersey? Phelps is convinced he's got his man, a convict he's corresponded with for years. But can Phelps make him confess?