One, two, three murders in Alexandria, VA over a span of years. While investigators tried to decipher if the crimes were related, they knew one thing for sure: all of them began with a knock at the door.

A wealthy couple is gunned down inside their home as they slept. Would the motive be money, sex, power, or none of the above? What police uncovered shocked them all.

A young teen disappears and the search to find her becomes national news. After she is discovered murdered, the answers to who, what and why are as perplexing as they are horrifying.

A young teen disappears and the search to find her becomes national news. After she is discovered murdered, the answers to who, what and why are as perplexing as they are horrifying.

A marriage gone south leads to murder. The truth of what happened was much closer to home than anyone expected. The path to prove it would be bumpy.

A young woman disappears during a quick trip to the store. It was a mere flash on a screen that would help solve what happened.

A vibrant octogenarian disappears. As investigators work to find her, a local grocery store may be what’s needed to solve this crime … and more.

A wife and mother was brutally murdered. A suspect emerged quickly, but the case went unsolved for decades. Would a new DA and a new look at the file, bring the justice long denied?

Three young women forever linked by a predator - 2 murdered and 1 who survived, her life forever changed. Video might be the key to finally identifying their attacker, and bringing him to justice.

What should have been a fun night at a concert, ends in murder. A case, that would take years to solve, but not before being linked to other terrible attacks.

A generous uncle disappears. Police quickly focus on a group of young men that had been staying at his home. But suspicions alone won’t solve this case.

A naval officer is killed when he and his colleagues are robbed on the island of St. Thomas. Even with much effort, the case soon went cold. It would take an international task force to solve it.

A missing 8 year old has the community frantic to find her. The missing persons case soon becomes a homicide. A note is discovered during the search that will prove pivotal to this crime.

The murder of a popular young man in Iowa remained unsolved for decades. Secrets never before revealed, may lead to this cold case finally being closed. Or would they?

A popular young local man is found by his fiancé dead in their Iowa home. His relationships are the suspected motive but the case soon goes cold. A chance encounter decades later might be the key to solving this crime.

Two active marines are murdered in a park on the island of Oahu, Hawaii. In the decades since their deaths, the road for one of their brother’s has been a long, painful, yet hopeful journey.

An 18 year old is missing after a night spent with friends. Once police find the teens’ body, they look at her circle of friends, suspecting that one of them is her killer.

After a private investigator is found dead, police narrow in on their suspect. But a huge obstacle remains: will they be able to prove what killed him.

Young women are going missing along the New Jersey shore. As bodies begin to be located, police need to locate an elusive killer before he strikes again.

A community parade ends in tragedy when a stray bullet takes the life of a child. Would the killer be brought to justice or would they disappear forever into the crowd?

A body is found inside an apartment and an ID of the killer is quickly made. But police soon realize that the case will be tougher to crack than they thought.

A missing woman is found buried in a shallow grave. What happened to her will shock the conscience. And for investigators, the challenge is proving who committed the crime.

A sibling’s concern for her sister and her family, leads her to call the police. What they find behind the door of the family’s home, was worse than anyone imagined.

Wedding festivities at a rental property come to a halt when the owner disappears, leaving behind signs of foul play. Guests, contractors, even her own family, become persons of interest as detectives try to find her.

Unpacking the mind of this killer gave investigators much more than they bargained for.