officer, it probably takes six to eight months to background and get the right person into the queue and another six months to get them into training. reporter: the chief reporting 2021 was a disturbing year, with about 9600 threats recorded against lawmakers. threats, he says, that are continuing. the biggest challenge i think we have is keeping up with the number of threats. we have we ve doubled the number of officers that investigate these threats. reporter: manger said many of the threats come in the form of emails, phone calls, social media posts. but some over the past year were more direct. democratic congresswoman norma torres told us last summer after she had a political dispute over twitter with the president of el salvador, she received multiple threats, then an anonymous video, a man s voice narrating it. he stated that he was following me and he panned out to a blue vehicle, which i had i owned, a blue suv.