Seven-year-old Michelle Norris is abducted from a playground in 1986 and killed in the nearby woods. Clues point to the murderer living in the neighborhood, and they could still be there.

Nineteen-year-old college student Faith Hedgepeth was brutally murdered in 2012, and her killer has never been found. Who sent the text message from her phone if she was already dead? And who wrote the mysterious note left by her?

How did 21-year-old student Christopher Jenkins die on Halloween night in 2002? Did he fall into the Mississippi River by accident? Did he commit suicide? Or was he murdered? And does a mysterious island hold all the answers?

In 2011, 32-year-old Rebecca Zahau was found dead, hanging naked, her hands bound behind her back. It had all the signs of murder, but police ruled it a suicide. Were they wrong?

It's been over 30 years since a brutal serial killer terrified Honolulu, savagely murdering five young women. Although he was never caught, new clues and eyewitness accounts offer strong evidence that this case can now be solved.

Security guard Ray Jennings was convicted of killing 18-year-old Michelle O'Keefe at a parking lot where he worked in 2000. Eleven years later he was declared innocent. But how did he know things only the killer could know?

Derrick answers questions about the ongoing Michelle Norris case, including how the team tracked down Joe Pelland, how he kept personal emotions out of the investigation, and who he believes is responsible for abducting and killing the 7-year-old girl.

Derrick tackles questions surrounding the Faith Hedgepeth case, including who he believes is a person of interest, the DNA found in the apartment and the meaning behind the mysterious note. Then, Kris catches up with Faith's father.

Derrick and Kris disagree on what happened to Christopher Jenkins that fateful Halloween night. Then, Kris and private investigator Chuck Loesch go head-to-head with their differing opinions on the case.

Several months after Derrick and Kris' investigation in Coronado, CA, new developments emerge regarding the death of Rebecca Zahau. This leads the team to defend their original opinions, and seek insight from former Los Angeles Times reporter Tony Perry.

After investigating five murders that occurred near the shores of Honolulu, Derrick and Kris recount the difficulties faced in their pursuit to uncover a serial killer. Retired homicide detective Louis Souza speaks out on his experience with the case.

The conclusions reached in the Michelle O'Keefe case are revisited, and new questions are answered. Mike O'Keefe provides updates on his struggle to process the past 18 years and where he stands on what happened to his daughter.