Peter Arredondo, the police chief of Uvalde Consolidated Independent School District, participated in an initial interview but has not yet answered requests for follow-ups made two days ago, a spokesman for the Texas Department of Public Safety said.

DPS spokesman Travis Considine said that “Uvalde and Uvalde CISD departments have been cooperating with investigators,” but added that Arredondo has not responded to requests for additional interviews.

Arredondo is said to be the incident commander who incorrectly believed the gunman to be a barricaded suspect and ordered officers to remain outside during the shooting.