Vanessa Marquez
Vanessa Marquez appeared in the long-running medical drama “ER,” but later claimed that her co-star George Clooney was responsible for her being blacklisted from Hollywood. This was later proven not to be the case. In fact, it was discovered that Marquez suffered from a series of mental health problems. And when a friend called the South Pasadena Fire Department to check on her because she was having seizures, Marquez pointed a gun at cops when they arrived. So, they acted accordingly and shot back, killing her.