Is the Gunman in the Classroom?

Within four minutes of police entering rob elementary school, one officer alerts others the shooter is in his wife's classroom. When border patrols tactical unit shows up, chief arodondo is heard trying to hold them back. Children continued to call nine one oneton, nickie and bred cross lost their beloved, ten year old josiah garcia. And don't understand why the police thought the gunman was holled up in an office. Where did you think the kids were? Itere makes no sense to us.