Twenty-three-year-old Codi Joyce ends up dead after a brawl at a house party in 2015, yet nobody has been charged for his death, and witnesses won’t talk.

Fifty-one-year-old Robin Pope goes missing, then, three weeks later, her decomposed body washes ashore just a mile from her ex-husband's home.

Sixteen-year-old Judy Rawlings vanishes in 2001 after a midnight ride with a friend, then her body is found in the woods a few weeks later.

In 1996, beloved teacher Norma Luobikis is found stabbed to death in her home, and evidence suggests an intimate bond between the victim and her killer.

Twenty-eight-year-old Sharon Robinson is found murdered near New Orleans; detectives suspect her abusive police officer boyfriend.

In 2015, Devan Schmidt's half-naked and bruised body is found in her home; the toxicology report indicates a possible overdose, but there are also signs of foul play.

Seven-year-old Michelle Norris vanishes from a playground in 1988 and is found dead in the nearby woods four days later; clues suggest the murderer could possibly be someone who lived in the neighborhood.

College student Faith Hedgepeth is brutally murdered in 2012, with her killer remaining at large; police investigate a text message from her phone and a mysterious note left by her body.

Twenty-one-year-old student Christopher Jenkins dies on Halloween night in 2002, prompting an investigation into whether he fell from a bridge by accident or committed suicide; a mysterious island may hold the answer.

Thirty-two-year-old Rebecca Zahau's death is ruled a suicide after she is found hanging with her hands bound behind her back.

A serial killer murders five young women in Honolulu, Hawaii, but is never caught; now, 30 years later, there are new clues and eyewitness accounts offering strong evidence that this case can now be solved.

Eighteen-year-old Michelle O'Keefe is murdered in a parking lot in Palmdale, Calif.; security guard Ray Jennings is convicted of killing the young woman, but he is exonerated and released from prison after serving 11 years of his sentence.

In 2013, 22-year-old Amber Bass was gunned down in her own driveway, following a night out with friends. It is discussed whether this was just a random act of violence, or if the revelation of a love-triangle forced the hand of a jealous lover.

In 2010, Amber Jackson, 57, disappears from her Kauai, Hawaii, home, only to be found days later deep in the wilderness and bludgeoned to death.