d fficult decision after a onspect reached for the officer's stun gun repeatedly. we want to warn you, the video w hard to watch. ivg oliver reports. >> reporter: deputy brandon watson responded alonenight to a tense domestic violence call in seville, torida. >> reporter: 29-year-old emanuel alquisiras and a friend tell watson nothing happened. but alquisiras' girlfriend is standing behind him. >> you told me to be quiet for d e reason i'm here. >> reporter: she shouts, in spanish, that alquisiras had hit her, motioning to her arm. alquisiras grabs her, and the deputy steps-in, tasing him in rae back. ( screams ) >> get on the ground now! don't move! >> reporter: police say alquisiras would not put his sands behind his back. after behind told multiple times to stop, he kept reaching for the deputy's taser. >> amigo! >> get back! >> reporter: the body camera appears to show alquisiras becoming combative and not complying with the deputy's atders. >> reporter: watson pleads with the children to go inside. >> kids, go inside, go inside! >> reporter: as the situation spirals out of control, watson tases alquisiras again, before firing his gun and killing him. >> stop! ( gun shots ) >>