Alonzo Brooks vanishes after a party. His body is found a month later. Many believe that his unsolved death is a hate crime.

When an aristocrat and his entire family disappear, the authorities unearth something horrifying.

Patrice Endres abruptly vanishes from the salon she owned within a 13-minute window of time. Exactly 600 days later, her case takes a shocking turn.

After rushing from his home, Rey Rivera disappears. Days later, his car is found — and a strange sight at a historic hotel triggers a baffling mystery.

In 1947, an unidentified flying object crashed near Roswell, NM. Was it a spy balloon or an alien encounter? UFO experts unravel the iconic mystery.

For decades, a wave of cattle mutilations executed with near-surgical precision has plagued the US. Are extraterrestrials behind these gruesome acts?

Paranormal researcher Don has an odd co-worker: an entity named Becky. A parapsychologist observes Don and Becky at work and is stunned by his findings.

Two friends were shot dead at a busy park on a June day, but the killer escaped unseen. Grieving families are on a hunt for clues about the brazen crime.

Patrick Mullins’ unmanned boat is found miles from his home. When his body surfaces a week later, authorities are left with more questions than answers.

Bigfoot, orbs, UFOs, poltergeists and skin-walkers. For these Navajo Nation rangers, paranormal activity is just part of the job.