Mom of suspect in school shooting plot had warned police about him

21-year-old Joshua Bagemehl of Sheboygan, Wis., faces a felony charge of "terrorist threats" -- accused of planning a school shooting. He was arrested just hours after allegedly purchasing an assault rifle. DEADLY TENN. SCHOOL BUS CRASH CASE HEADS TO GRAND JURY According to the criminal complaint, the Sheboygan Police Department received an anonymous Crime Stoppers tip on Monday, December 12th that Bagemehl "was planning a school shooting, according to his Facebook posts." "This is just scary stuff," Joe DeCecco, Sheboygan County District Attorney, said. 'AFFLUENZA' TEEN'S DAD CONVICTED OF PRETENDING TO BE OFFICER A Facebook post on December 10th read as follows: "So, I might be buying a AR-15 with a laser red dot on it and (expletive) semi-auto too .22 caliber. Just waiting on the background check." On December 11th, Bagemehl's Facebook post reads as follows: "Someone needs to do a school shooting around here. It would be funny as (expletive)." Then on December 12th, Bagemehl's Facebook post reads as follows: "My AR-15 style rifle, my 715T Mossberg semi-auto rifle with 300 rounds with red dot laser sight." The post was accompanied by two photos of the rifle in its open case. Bagemehl allegedly bought it legally at Gander Mountain. In a reply to one of the posts, the complaint says Bagemehl wrote: "Ima live by the gun, die by the gun. Ima die holding a gun." "Would this have come to fruition, I don't know, but we're not taking any chances," DeCecco said. The complaint indicates police obtained a search warrant for Bagemehl's residence for "firearms, ammunition and all electronic devices, including cell phones." Officers executed the search warrant and arrested Bagemehl. When investigators interviewed Bagemehl, the criminal complaint says he "spontaneously stated '(expletive) are calling on me every time I post a gun on Facebook.'" The defendant stated "he didn’t care what 'other' people thought and that it would be 'funny' if someone did a school shooting in Sheboygan." When authorities asked Bagemehl what they might find on his cell phone, he said: "Well, you're going to see videos of ISIS beheadings, of explosions. You're going to see drive-by shootings," the complaint says. The complaint indicates Bagemehl's mother told police back in January that "Joshua was schizophrenic and bipolar." According to the complaint, Bagemehl told authorities he enjoyed watching videos of school shootings and watched violent videos when he had the urge to shoot people, which relieved his stress. There was no answer Tuesday at the home where Bagemehl lives with his mother. Neighbors said they were shocked by the accusations.