A 26-year-old Lancaster resident, who used a hunting bow and arrow to kill a man who tried to break up an argument between the killer and his girlfriend, was convicted this week of first-degree murder.

Garrett Taylor Adams is set to be sentenced today for the Aug. 23, 2014, murder of 27-year-old Charles Briggs, also of Lancaster.

Adams was arguing with his girlfriend at a residence in the 43000 block of 27th Street West when his brother and Briggs arrived about 3:30 a.m. and tried to intervene, according to police.

The dispute spilled outside onto the sidewalk, where the suspect armed himself with a hunting bow and arrow and shot the victim once in the upper body, sheriff’s Deputy Ryan Rouzan said shortly after the attack.