Colorado school shooter entered through open door

Arapahoe County Sheriff Grayson Robinson gestures Monday during a news conference at which he and other officials discussed the investigation into the Dec. 13 shooting at Arapahoe High School in Centennial, Colo.

Arapahoe County Sheriff Grayson Robinson gestures Monday during a news conference at which he and other officials discussed the investigation into the Dec. 13 shooting at Arapahoe High School in Centennial, Colo.

CENTENNIAL, Colo. (AP) — The teenager who fatally shot a fellow student at his suburban Denver high school this month entered through a door that was supposed to be locked but had been propped open, the sheriff said Monday.

Even if the door had been locked, it probably wouldn’t have deterred 18-year-old Karl Pierson, Arapahoe County Sheriff Grayson Robinson said. “He was bent on evil and he was bent on causing the maximum harm to the maximum number of people possible,” he said.

Pierson was carrying a shotgun, more than 125 shotgun shells, a machete and three homemade firebombs, investigators say. He shot and killed himself as sheriff’s Deputy James Englert closed in on him, Robinson said.

The door Pierson used was frequently propped open, probably to make it easier to leave and re-enter, Robinson said. He said he did not know who had left it open that day.

The door was one of the few new details released Monday at a news conference on the investigation into the Dec. 13 assault on Arapahoe County High School in the southern suburb of Centennial.

Claire Davis, a 17-year-old senior, was shot point-blank in the face and died Dec. 21. She had been hospitalized in critical condition. Davis’ funeral took place Saturday, and Englert served as a pallbearer at the family’s request, Robinson said.

Englert is assigned as a resource officer at Arapahoe County High, and Robinson credits him with averting more bloodshed by rushing to confront Pierson. “James Englert is a hero, there’s no question,” Robinson said. “James responded heroically and he saved lives.”

An unarmed school security officer, retired sheriff’s deputy Rod Mauler, also ran toward the hallway and room where shots were being fired, Robinson said.

Robinson has said Davis was a random victim and that Pierson’s main target was a speech team coach who had disciplined Pierson. Robinson declined to offer any details of the discipline. Authorities have not released the coach’s name.

The sheriff said he could not predict when the investigation would be complete.

Investigators say Pierson purchased the shotgun legally a week before the shooting, and they believe he acted alone, but they are still looking into whether anyone else knew of Pierson’s plans.

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