As lawmakers call for investigations into how rioters were allowed to storm the nation's Capitol, local security experts have weighed in on what went wrong.

Kenneth Gray is a retired FBI agent and professor of criminal justice at the University of New Haven.

"They had inadequate numbers of security personnel, of Capitol Police, of Metro police," he said. "It was not a secret that people were going to make their way to the Capitol."

Kevin Kline is a security consultant who worked for the Bureau for 29 years.

He says with 2,300 members, the Capitol Police shouldn't have been caught unaware.

"They have very specific jurisdiction, duties and responsibilities for which they plan for, which they train for, and that all appeared to break down," said Kline.

Once rioters breached the barricades and stormed the Capitol building, the National Guard was deployed. Gray calls that too little, too late.

"National Guard probably should have been kept in immediate ready reserve to be able to go in there and control the situation, again based on the size of the event itself," said Gray.

Kline says in D.C., jurisdictions can get complicated.

"The National Guard for the District of Columbia is under the executive branch and is deployed at the authority of the executive," said Kline.

President-elect Joe Biden will be inaugurated Jan. 20. Security for that event is headed up by the Secret Service.

The Associated Press reported the chief of the Capitol Police will resign from his position next week.

Another key security official, House Sergeant-at-Arms Paul Irving, has already submitted his resignation.