George Barr, 75, appeared at a hearing on Wednesday, where the charges against him were downgraded to third degree murder.
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Salis Hanrahan was killed in the shooting on July 8.
The 20-year-old had been working at Barr's home on the 400 block Ripka Street.
Federal officials say Hanrahan was in the country illegally, and had been connected to a traveling group, that targeted homeowners with fraudulent contracting work.