whether or not ronald johnson had a weapon at the time or to understand what the officers were encountering at the time that they responded to the scene. >> reporter: what unit was this? >> at the time that the officers received those calls they were dispatched. the first car to arrive was officers hooper and officer monti. they were in an unmarked vehicle that did not have dash cameras. the unmarked vehicles are not equipped with in-car camera recording equipment. the second car to arrive was a marked vehicle that had officer abraham and officer calvin. that did a dash camera. it was activated. that will be the camera that is relevant that we will be showing to you. that camera did not have an audio portion activated. it was video only.