Lee Harvey Oswald
Oswald's life, childhood, and possible mental illness
One source claims he was diagnosed with a personality disorder and very dangerous passive aggressive tendencies. His wife often noted that he had fits of anger where he could not be controlled and most of the neighbors thought he had killed her on multiple occasions. The day he assassinated kennedy he left his wedding ring on the table. All of this shows passable evidence through his aggressive tendencies and his fits of anger against even his wife.