Alan Spector:
This crazy genius is behind some of the biggest musical classics for the likes of the Beatles, the Ramones, Tina Turner and others. But he was also dangerously weird. Spector, according to testimonies, held others at gunpoint before he shot and killed actress Lana Clarkson in his mansion in Los Angeles. The first trial resulted in a hung jury, while the second jury found him guilty, and he was sentenced to 19 years to life.