A Tucson man is facing up to a 22-year prison sentence after pleading guilty to second-degree murder.
Pima County prosecutors say 26-year-old Louie Childs entered his plea Wednesday.
The Arizona Daily Star says Childs is scheduled to be sentenced March 4 and the sentencing range is 10 to 22 years.
Authorities say Childs admitted to repeatedly stabbing his 26-year-old roommate Craig Alcorta with a kitchen knife on Dec. 3, 2011.
Childs originally told investigators he thought Alcorta was a pedophile who had "bad intentions" toward Childs' young sister.
Detectives say Childs eventually told them that Alcorta had tried to hit him and that led to the stabbing.
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