Listen to the WBAP video around time stamp 3:15:00 - 3:45:00. They are definitely carrying NBC coverage at that time. The official flash from Kilduff is reported at timestamp 3:37:00. There is a 1:00 time-check at timestamp 03:05:05.
You are correct. Up to 11:54 PM CST (2:55:40 on the recording), it was broadcasting for ABC, 570 AM. Then the recording stopped.
On the tape recording, it immediately resumed again, but over an hour had passed. It started recording at about 12:50 PM CST (2:55:52 on the recording). You are right, by that time, WBAP had switched to NBC on 820 AM. And it was NBC during 1:00 through 1:40.
But what could cause Officer E. G. Sabastian “NBC News is reporting DOA” when we now know that NBC did not report this?
Well, listening to various radio recordings, I see that stations only occasionally identify themselves as WBAP/NBC, WBAP/ABC WFAA/NBC or WFAA/ABC. Probably, the way Officer E. G. Sabastian would identify a station is from the voice of the announcer. Just as, if you heard the TV in 1963 and heard the voice of Walter Cronkite reporting the news, you can infer that this is CBS news. Officer Sabastian would likely have done the same. If so, the voice he heard was sometimes on WFAA with NBC News (on 820 AM) was also sometimes on WFAA with ABC News (on 570 AM).
Going about his business, he could be stopped at a light and hear the radio from a car besides him, and hear that a Dallas police officer was dead. This could cause him to radio the Dispatcher to confirm this, and say that NBC News was reporting this, when in actual truth the reporter was on the ABC frequency at the time. I think something like this scenario is likely because I doubt Officer E. G. Sabastian was listening to the radio while on duty. It could cause him to miss a message from the Dispatcher.
So, what does our recording of WFAA report? David Von Pein has this recording below:
However, like so many of our other recordings, it starts well after the assassination. Three minutes into the recording, it says: “This report was issued at 1:48, which was just a few moments ago.” So, this recording started at 1:45 PM CST, which is too late to tell us what they were broadcasting between 1:10 PM and 1:40 PM, which is what we need.
It is often reported that all the radio stations reported everything they broadcasted. This is clearly not true. While a fair number were recording hours of broadcasting that day, even before the assassination, this may have been unusual and was only happening that day because of the President’s visit to Dallas. WBAP managed to start recording by 12:50 CST. They were setup to do this, since they were recording the President’s arrival at Love Field just an hour before. WFAA, which was not recording this event, took longer to hook up the recorder. KBOX is another station that comes to mind as starting its recording well after the assassination.
So, was Officer E. G. Sabastian correct that the death of an officer was reported by the media? We have no reason to believe he was not correct. Various local news stations did monitor the police radio frequencies. They could have learned of this shooting very early. Radio stations would broadcast news that had not yet been officially confirmed, like the shooting of a Secret Service man at Dealey Plaza, which was not an official report, or even a true report.
I would be shocked if we ever learned that Officer E. G. Sabastian was mistaken. It’s one thing to confuse two announcements that are an hour apart in time, two weeks later, as Mr. Brewer allegedly did. As I used to think he likely did. But to confuse two reports, one an hour in the past and the other a half hour in the future? No way.
Do people think that Officer E. G. Sabastian was hearing voices?
P. S.
A see that David Von Pein has also pointed out that when the recording of KBOX starts at 1:35 PM, within the first minute it reports that a Dallas detective was DOA at Parkland Hospital. And as David reports, this was two errors, ‘detective’ and ‘Parkland’. But it shows that local Dallas news stations were reporting on the death of a Dallas policeman a good deal earlier than I had been led to believe. And it is possible that this was not the first report on the death of a policeman but was a repeat of an earlier report. We cannot tell because, like other stations, KBOX was not recording its broadcast at the time of the assassination and it took a little while to setup the recording equipment.
But even the 1:36 report is early enough that Mr. Brewer could have heard this just before Oswald walked up to his store.