NBC News is reporting that Adam Lanza, the alleged Newtown school shooter, had an “altercation” at Sandy Hook Elementary on Thursday, the day before the shooting.
Law enforcement sources told NBC News that Lanza, 20, had the “altercation” with four staff members. Details of the altercation were not known.
Sources told NBC News that three of the four staff members involved in the altercation were killed Friday. The fourth staff member involved in the incident Thursday was not at the school that day, and is being interviewed by state and federal investigators, according to the report by NBC News’ Pete Williams.