taylor, an e.m.t. who was killed in march inside her own home. for the first time we are seeing the chaotic moments after she was shot. here's cbs's jericka duncan come outside. >> reporter: this new video taken in march by a neighbor of breonna taylor's shows a small army of police officers with their guns drawn arresting taylor's boyfriend kenneth ylor's boy >> keep walking back! walk backwards! >> reporter: police claim they had a no-knock warrant for taylor's home because of a drug investigation, but the lead officer sergeant jonathan mattingly told investigators in a newly released audio interview that on the night of the deadly shooting officers did knock on taylor's door. >> reporter: our intent was to give her plenty of time to come to the door because they said she is probably there alone. >> reporter: but she wasn't. taylor's boyfriend kenneth walker, a licensed gun owner, fired one shot striking wner fired o the leg. >> i got four rounds off and it was like simultaneous, boom, boom, boom, boom. but in walker's interview, he claims officers did not announce themselves and he thought they ugre intruders. >> all of a sudden there was a w