"I don't think it's a far stretch to say that some lives may have been saved if we were allowed to intervene," a Capitol Police source told the BBC.
Del. Eleanor Holmes Norton (D-D.C.) said Thursday that the Capitol Police union had asked to meet with her to discuss the response.
“Norton spoke with Capitol Police officers at the Navy Yard and she understands their frustration that the tactical team was not allowed to proceed,” her office said in a statement.
“Norton believes an investigation is necessary to determine whether other tactical police forces were on the scene or available, whether lives could have been saved by Capitol Police without putting the Capitol at risk, and if there was proper coordination of police forces.”
Dine said that the review would be led by Michael Strenger, assistant sergeant at arms for protective services and continuity. The review is due to be completed by Oct. 21.