Mitchell Kenneth Kusick, of Westminster, was being held Tuesday on suspicion of a federal charge of threats against a president. He identified himself as a student at Colorado Mesa University in western Colorado, investigators said.
According to KUSA-TV in Denver, Jefferson County court records show he told his therapist about wanting to shoot students at a trick-or-treat event at Standley Lake High School.
Federal court records say Kusick said he took a shotgun from his aunt's house and tried to buy ammunition. He told his therapist on Oct. 29 about his plan and allegedly said he wanted to go down in history as the "guy who killed Obama." His comments came days before the president held a campaign rally in Boulder.
Kusick also said he was obsessed with the deadly shootings at Columbine High School and Virginia Tech, according to court records.
The therapist called police, and Kusick was placed on a mental health hold at a hospital.
A detention hearing is scheduled Friday.