For anyone keeping score, here's all the Tippit times I could find and what's interesting is the spread of times. Allowing for a 15 minute buffer we see the only time which can satisfy everyone's recollection is 1:15. Can the people who specifically specified about 1:30 be so wrong and why say 1:30 and not about 1:00 PM, logically they must have known it was closer to 1:30, which we know to be true.
Btw The person who had the most reason to be aware of the time is Scoggins who was on his lunch break and if he was anything like me, "the time on your lunch break feels like 10 x the time of actually working" so Scoggins who looked for parking, left the cab, went to buy his lunch, watched the telly "I got me a coke and watched television for a few minutes, I would say 10, 12, 15 minutes" then went back to his cab, would have to be reasonably aware of the time he had left and his 1:20 guess is near perfect. Scoggins wins!
ELBERT AUSTIN, sometime after 1:00 PM
ROGER BALLEW, time?
Mr. BENAVIDES - I imagine it was about 1 o'clock.
BOWLEY I looked at my watch and it said 1:10 pm.
Mrs. MARY BROCK, approximately 1:30 PM
ROBERT BROCK, approximately 1:30 PM,
JIMMY EARL BURT time?
Mr. CALLAWAY. about 1 pm
FRANK CIMINO around 1 p.m.
Barbara Jeanette Davis shortly after 1:00 pm
Mrs. Virginia Davis, about 1:30 pm
Sam Guinyard about 1:00 pm
FRANCIS KINNETH, approximately 1:00 PM
I, L. J. Lewis time?
Mrs. MARKHAM. I wouldn't be afraid to bet it wasn't 6 or 7 minutes after 1.
PATTERSON advised that at approximately 1:30 PM
Mr.REYNOLDS. time?
HAROLD RUSSELL time?
Mr. SCOGGINS. Around 1:20 in the afternoon.