Alfred Jackson Jr., 26, and Olivia Guster, 24, each stand accused of murder, according to Denton County Jail records. The incident occurred just before 1 a.m. on Sunday, according to a press release issued by the Denton Police Department. A 911 call alerted dispatchers to a fight in the parking lot of the QuikTrip on West Eagle Drive. "The investigation determined that Jackson, Guster, the victim, and the victim's friend were involved in a verbal dispute over a right-of-way issue in the parking lot," the press release reads. "Evidence showed the dispute turned into a physical fight when Jackson struck the victim's friend with a shovel.