“As far as I know, there’s never been a PPO that was deployed to protect postal facilities based on intelligence gleaned from iCOP,” Mr. Albergo said. “I mean, I don’t know what they could be using that for. To my eyes, it’s certainly not to protect the postal service. “It’s a federal law enforcement agency that’s completely out of control, if you ask me.” Congressional Republicans have sought information about what iCOP is doing but have received few answers. Chief Postal Inspector Gary R. Barksdale privately briefed lawmakers on the program last month. He said the agency expanded iCOP’s function last year as threats to Postal Service leadership, employees and facilities increased, according to Rep. James Comer, the top-ranking Republican on the House Oversight and Reform Committee.