Oregon’s congressional delegation: Portland demonstrator wounded by U.S. Marshals Service tactical unit member

The federal employee who critically wounded a 26-year-old demonstrator on Saturday is assigned to a specialized tactical unit of the U.S. Marshals Service, members of Oregon's congressional delegation revealed in a letter Tuesday to top federal law enforcement officials.

The lawmakers demanded to know more about the federal government's response to protests that have roiled Portland nightly for nearly two months. They said they are especially concerned that the Marshals Service and other federal agents working the protests are taking direction from federal officials outside of Oregon.

"Their presence and lack of coordination raises urgent concerns about how those engaging in illegal use of force against demonstrators will be held accountable," U.S. Sens. Ron Wyden and Jeff Merkley, and U.S. Reps. Earl Blumenauer and Suzanne Bonamici, all Democrats, wrote in a letter to U.S. Attorney General William Barr and Acting Homeland Security Secretary Chad Wolf.