A Colorado man has been sentenced to life in prison for stalking his wife while posing as her ex-boyfriend and then murdering her, acts that the woman's father said were “pure selfish evil” that have robbed the couple’s three children of their parents.

Daniel Krug was convicted of killing his wife after stalking her and sending her disturbing messages pretending to be her ex-boyfriend, according to the AP. They found Krug guilty of all the charges he faced – first degree murder,