store, is wearing a mask. his family says because he often got cold since he's anemic. >> stop right there. hey, stop right there. stop! stop! >> i have a right to go where i'm going. >> stop. i have a right to stop you, because you're being suspicious. >> reporter: in seconds, it escalates. the officer grabs mcclain. >> stop tensing up. >> let go of me. no, i am an introvert. please respect my boundaries that i'm speaking. let go of me! >> reporter: soon, he's surrounded by officers. one applies a carotid control hold, claiming that mcclain allegedly reached for one of their guns. mcclain pleads, saying that he's different, but that he's nonviolent. >> i'm so sorry. i have no gun. i don't do that stuff. i don't do fighting. why are you taking me? >> reporter: clearly in pain, at one point, he says the phrase now infamous. >> i can't breathe! >> reporter: authorities restrained mcclain.