Kristi Noem, the homeland security secretary, said officers had not used pepper spray and similar measures limited by a judge’s order, then was confronted with a video that showed chemical agents deployed.

Kristi Noem, the homeland security secretary, said officers had not used pepper spray and similar measures limited by a judge’s order, then was confronted with a video that showed chemical agents deployed.

Homeland Security Secretary Kristi Noem denied in a televised interview on Sunday that her department had used pepper spray and similar tactics curtailed by a judicial order issued last week, then backtracked.