Disturbing video shows the moment DC Metropolitan Police officer Mike Fanone screamed out as he was tasered in the head by a mob during the Capitol Riots in January.
In this interview, he tells the BBC he feared for his life as he was seized by protesters outside the Capitol.
Supporters of then-President Donald Trump stormed the building following his election defeat.
Speaking in the BBC documentary, Four Hours at the Capitol, on BBC Two, Mike Fanone describes the enormity of the situation as he pleaded for his life.
Watch Four Hours at the Capitol at 21:00 GMT on BBC Two on 20 October, and on BBC iPlayer (UK Only).
Produced and directed by Jamie Roberts
Executive producer: Dan Reed
Digital edit: Mattea Bubalo