During a hearing before members of the House Appropriations Committee, Walker said that his office has developed an "insider threat awareness program" to identify "insider threats and employees who do lose their compass."

"The goal is to have police officers trained as insider threat specialists so we recognize the signs and symptoms and indicators that someone's allegiance has changed," Walker said during the House Appropriations subcommittee hearing.

Walker's plan comes a year after the Jan. 6 breach of the U.S. Capitol building, which saw leaders who were in charge of the U.S. Capitol Police on that day ousted following criticism for intelligence and other failures.

He said his office will brief the full Capitol Police Board, which oversees the department, on the plan in the coming months.

Manger told lawmakers on Tuesday that he believes "it all begins with the hiring process."

Background investigations, polygraphs, and social media investigations will be crucial to ensure those with extremist views aren't hired, Manger said.