While the Christmas holiday is generally viewed as a time when people come together to celebrate the joy of the season, for criminals who never take a day off, it's just another opportunity to prey on the innocent. On December 23, 1989, the Harris family fell victim to just such a predator. After generously offering him shelter from a snowstorm, he had repaid them with a night of unspeakable horror that ended in the worst way imaginable.

In 1987, a brutal murder occurred in the basement of a house on a quiet residential street in the city of Boise, Idaho. Though the killers were ultimately brought to justice, unexplained events and mysterious sightings have led to speculation that the dwelling is now the stomping grounds of dark entities who are anything but friendly.

This episode explores the brutal slaying of nineteen-year-old Carmen Van Huss. Popular and beloved by everyone who knew her, finding the perpetrator had been an uphill battle from the start. Three decades would pass before advances in DNA technology helped detectives crack the case and bring an alleged killer to justice.

On Halloween night, 1974, an eight-year-old boy died after consuming tainted candy. In the days that followed, investigators worked tirelessly to find the killer. When the shocking truth was finally revealed, the identity of the culprit not only shook a Texas town to its core but changed the way parents viewed Trick or Treat for decades to come.

Twenty-seven-year-old Ellen Greenberg was found dead in her Philadelphia apartment in the winter of 2011. Although her body was riddled with twenty stab wounds, many to the back of her head and neck, her death was ruled a suicide. Today, over a decade later, her family remains committed to getting to the bottom of what happened to their daughter in her final moments.

In 1966, West Virginia resident Woodrow Derenberger's encounter with a visitor who claimed to be from another dimension made headlines. A year later, a strange, winged creature appeared in the skies over the town of Point Pleasant. The tragic events that followed led many to believe that otherworldly forces were at play in the Mountain State.

In the winter of 2018, a quiet Michigan suburb was rocked by a murder/suicide that wiped out an entire family. The investigation that followed would lead some to believe that the shunning the Stuarts endured as a result of cutting ties with the church had set the wheels of murder in motion.

This episode recounts the 2007 kidnapping, sexual assault and brutal slaying of college student Jodi Sanderholm. Among other things, the investigation would uncover the disturbing fact that the perpetrator had been stalking his victim since childhood.