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.

Buffalo Jim Barrier’s larger-than-life presence in Las Vegas rankled the mob. Could that explain his untimely death under suspicious circumstances?

On an icy night, police find JoAnn Romain’s abandoned car and assume she drowned in a nearby lake by suicide. But her family suspects foul play.