COLORADO SPRINGS, CO – A 19 year old Colorado Springs Man, accused of a gruesome double murder, had a history of mental illness, and substance abuse. Malik Murphy is accused of fatally stabbing his 5 year old sister, and 7 year old brother early Tuesday at a home near Fillmore and Hancock. He also stabbed his father in the neck. The father is now out of the hospital. Earlier this year, Murphy set his parentsâ€™ SUV on fire in Illinois.