James Tinsley was convicted of fatally shooting Tony Contreras, Jesse Contreras and Casey Contreras. The three men were found dead inside the Immaculate Auto Sales on Jan. 8, 2015.
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During the trial, prosecutors reiterated that Tinsley had purchased a car from the dealership. He couldn't make the payments, so it was repossessed.
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Authorities believe that led him back to the dealership, where he fatally shot the three men.
After the murders, Tinsley confessed to his girlfriend and she turned him in.
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He also tried to burn the car dealership building down, court documents stated.
Tinsley was sentenced to life in prison.
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