Thanks Duncan, if I understand Murray Jackson correctly, he said that someone, immediately prior to the radio transmission by a citizen, telephoned into DPD a report of a disturbance involving a police officer in that same area. That’s interesting!
Charles,
Mary Wright heard the shots and called the police "immediately" (her word). Murray Jackson is not aware that Tippit has been shot until Bowley reports it using the patrol car radio. Bowley's report is at 1:16/1:17. This confirms that the time of the shooting occurred just a minute or two before Bowley's report. If the shooting had occurred earlier, then Jackson would have already known about it by the time Bowley made his report because Jackson would have already received notice of the call by Mary Wright. We know Jackson was unaware of the shooting when Bowley made his report because the first thing Jackson does, once Bowley gives the location, is call out for 78 (Tippit's call number).
This is yet one more piece of proof that the shooting occurred at roughly 1:15 and not as early as 1:07 to 1:10.