From The Denver Post:  New details about the events that led up to the 2013 shooting at Arapahoe High School are expected to be released on Monday, marking the end of a months-long arbitration between Littleton Public Schools and the parents of the 17-year-old killed in the shooting.

In April, the board of education for the school district voted unanimously to approve a proposal from Claire Davis’ family agreeing to start arbitration proceedings to avoid a lawsuit over the shooting that left her dead. As part of that agreement, the school district agreed to start arbitration that would include full discovery to uncover the events that led to the shooting on Dec. 13, 2013.

Davis was killed by a classmate who then killed himself. Her parents, Michael and Desiree, asked the school district to release information about the shooting in return for not being sued.

The gunman, 18-year-old Karl Pierson, had a pattern of angry outbursts. He told one student to “just go gut” himself and cursed at others who laughed when a math teacher read his math test score aloud. Arapahoe High School administrators deemed Pierson a low-level risk despite a threat assessment that showed a “significant history” of violent behavior and that also noted his mother told staff he had a deep-seated anger toward others.

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