A Manchester West High School student remains jailed after his ex-girlfriend told police he said he was going to “do a Columbine” at the school, Manchester District Court documents show.

Sterling Lindbloom, 17, of 659 Montgomery St., Manchester, allegedly called the girl on Wednesday, Feb. 20, and made threats to bring a gun to school and shoot the school resource officer, administrators and other students. He has been charged with several counts of criminal threatening, a misdemeanor.

Lindbloom was placed on preventative detention until his next court date, attorneys on both sides agreeing his suicidal tendencies made him a danger to himself and others. A hearing on the preventative order scheduled for Monday, Feb. 25, was continued.

Lindbloom said “People need to watch their backs because something bad is going to happen at the school,” the girl told police and school administrators, according court records.

Upon questioning, Lindbloom said he had a store of weapons in a small structure in the woods behind his house, which police later discovered. In it were found four knives, two hatchets, 31 rounds of .22 caliber ammunition, a copper pipe and blankets.

No guns were recovered, but, according to a police affidavit, Lindbloom said he had plans to obtain one from the home of a friend’s uncle in Massachusetts.

Lindbloom’s former girlfriend told Manchester West Assistant Principal Keith Puglisi about the phone call on Thursday, Feb. 21, during which Lindbloom allegedly said she would be the second to last person to die in the act before himself. She said the call had occurred between 3 p.m. and 6 p.m. on the previous evening, Wednesday, Feb. 20.

He allegedly specifically threatened the lives of school resource officer Jamie Branch, Assistant Principal Gary Dempsey, Junior ROTC Commander Ed Hafner and another student at West during the phone conversation.

Branch said in his affidavit Lindbloom did not deny any of the specific threats when he questioned Lindbloom at his home after speaking with the girl and school administrators.

According to Branch, Lindbloom’s name had come up before regarding a $50 theft from a teacher at West, and he asked Lindbloom a few questions about that to lead into a discussion on the phone call.

At first, Lindbloom said his words were misconstrued, saying his words were, “I’d rather do a Columbine in the school than deal with what I have to deal with.”

According to police, Lindbloom had recently broken up with another student at West and was upset. He admitted to Branch that he was suicidal at the time of the call, which he said was around 4:30 p.m.

He was placed under arrest on Thursday, Feb. 21, and while waiting in Branch’s cruiser for transport to arrive, mentioned the small structure in the woods.

After he was picked up, Branch said in the affidavit, Branch looked in the woods and found the structure containing the weapons.

An inquiry to the owner of the property revealed the owner had no knowledge of the stash of weapons, Branch said.