A man who made "zombie noises" after fatally wounding another man outside of his own home with a knife and a hammer has been jailed.
Twenty-year-old Gerardo Enrique Perez attacked Leslie Beus, 68, outside his home in Utah. Beus tried to get away from his attacker by going inside his house, however Perez followed.
Perez was then located by police a few blocks south of Beus' home, with witnesses saying he was acting strangely and made zombie noises as he walked down the street, according to the Salt Lake Tribune.
Beus was put on life support after the attack but died a week later, having sustained skull fractures from Perez's assault.
In October Perez pleaded guilty to murder, aggravated burglary and aggravated assault.
He was sentenced to 15 years to life for the murder count, up to five years for the assault and five to life for the burglary.
Robin Ljungberg, Perez's attorney claimed he had an undiagnosed mental illness at the time of the attack, but he is now on medication and receiving treatment.
A report claimed he had delusions and heard voices. However Beus' son William Dearing said he was angry that Perez had not received a harsher punishment.
He did not accept that Perez had a mental illness, and claimed he acted normally when police questioned him.