The teenager accused of killing three people at a house party near Seattle bought his AR-15-style rifle so recently he had to study the instruction manual before the rampage, police say. According to court documents, 19-year-old Allen Ivanov has told police that he bought the Ruger firearm just a week ago and carried out the shooting because he was angry that the "dream girl" he split up with two months ago didn't want to get back together with him, NBC News reports. Investigators say Ivanov has told them that on Friday night, he bought another magazine for the gun after leaving his job at an Apple Store early. He drove to the party in the suburb of Mukilteo around 10pm and looked through a window. After spotting his ex with another man, he returned to the car to study the rifle's instructions. Around midnight, he allegedly returned to the party and opened fire.
Cops say Ivanov killed his ex-girlfriend, Anna Bui, as well as partygoers Jake Long and Jordan Ebner, all 19 years old. An 18-year-old victim was seriously injured. Ivanov, who fled after the shooting and was arrested more than 100 miles away, is being held without bail on charges including first-degree murder, KOMO reports. Investigators say the teen's recent posts on social media suggest the murders were planned. Tim Leary, a lawyer hired by his parents, tells the Seattle Times it worries him that Ivanov could buy the AR-15 when he is too young to buy beer. The fact that he had to read the manual "speaks volumes to his youth and inexperience and highlights the lethality of the weapon involved," he says. (The family of the AR-15's inventor says he'd be "sickened" by his gun's use.)