A 17-year-old boy who shot his sister and mother said that watching horror movie Halloween gave him the idea because he was 'amazed at how at ease the boy was during the murders and how little remorse he had'.

Jake Evans' disturbing four-page confession was released yesterday during his trial for the October 3 shooting deaths of his sister Mallory and mother Jami in their upscale home in a gated community of Aledo, Texas. 

The chilling confession spells out in intricate, matter-of-fact detail the thoughts and actions of the 17-year-old in the hours leading up to and during the inexplicable slaying of his two family members.

Though Evans is not known to have been suffering from any mental illness at the time, he writes that after the shooting, 'in shock I ran into my room and screamed at the top of my lungs that I am really messed up and that I killed my mom and sister'.

Read more at the Daily Mail