Blaec Lammers has been accused of attempting to go on a mass-murder spree at a film theater showing the latest “Twilight” movie, “The Twilight Saga: Breaking Dawn -- Part 2,” according to police in Bolivar, Mo., on Friday.

Lammers' first plan was to shoot up a theater, but he later decided to target a Wal-Mart store because he would be able to get more ammunition that way, according to court documents obtained by KCTV5 in Kansas City, Mo.

Lammers was charged Friday with first-degree assault, making a terroristic threat, and armed criminal action, KCTV5 reported.

Lammers' plan was exposed by his mother when she called the cops to tell them she thought her son was going to commit a crime similar to the mass shootings in Aurora, Colo., in July, according to KY3 in Springfield, Mo.

After his mother talked to the police, Lammers allegedly admitted his intentions to authorities. "[S]o he decided that he would go and shoot people at Wal-Mart in Bolivar," a police detective wrote in a court document.

The detective added that Lammers said "he would walk into the store and just start shooting people at random and if he ran out of ammunition (he said he purchased 400 rounds) he would just break the glass where the ammunition is being stored and get some more and keep on shooting until the police arrived. [Lammers] then stated that he would then turn himself into police when they arrived."

Lammers also allegedly told police "he had a lot in common" with people who had recently committed mass murders, according to a probable-cause statement obtained by KY3.

"He stated that he was quiet, kind of a loner, had recently purchased firearms and didn't tell anybody about it, and had homicidal thoughts," the statement said.

Lammers reportedly explained to police that he practiced shooting on Tuesday. He also reportedly told them "he had never shot a gun before and wanted to make sure he knew how they shot and how they functioned."