Best known as Jack Tripper from the hit sitcom "Three's Company," John Ritter died of an undetected heart problem in 2003 — and his family blamed his doctors.

According to centuries-old Filipino folklore, the aswang combines the most terrifying traits of vampires, were-beasts, and witches into a single monster that inspires unparalleled fear to this day.

The banshee is usually described as a woman wailing or singing, and according to ancient Irish mythology, she always heralds death.

Gary Coleman showed great promise in the 1970s and 1980s, but on May 28, 2010, he fell down the stairs in his Utah home and suffered a fatal brain hemorrhage.

WWE legend "Rowdy" Roddy Piper died of a heart attack on July 31, 2015, leaving behind millions of fans to mourn the most famous heel in pro wrestling.

One of Hollywood's most glamorous stars before she became Princess Grace of Monaco, Grace Kelly died the day after she crashed her car off a cliff near Monte Carlo in 1982.

One of the world's most glamorous movie stars, Audrey Hepburn died on January 20, 1993, just three months after she was diagnosed with cancer.

After legendary singer Frank Sinatra died of a heart attack on May 14, 1998, his tragic demise forced an ugly family feud into the spotlight.

Ernest Hemingway famously struggled with alcoholism and mental illness for decades before taking his own life in 1961.

During a 10-day spree in March 2013, Joanna Dennehy killed two of her roommates and her landlord before attempting to butcher two more men she randomly encountered walking their dogs.

In the early 1800s, John Bell and his family were reportedly haunted by a malevolent spirit dubbed the Bell Witch — an ordeal that ultimately ended in murder.