Mr. BALL. You know what time you usually get your bus, don't you?
Mrs. MARKHAM. 1:15.
Mr. BALL. So it was before 1:15?
Mrs. MARKHAM. Yes, it was.
It is entirely plausible that the 1:12 bus Markham usually took was late by three minutes.
It is completely implausible that the 1:22 bus usually arrived at the bus stop on Jefferson seven minutes too early.
Besides, even if Tippit was really killed at 1:15, Markham should have been at the bus stop and not one block away at 10th/Patton. This alone indicates that Tippit must have been shot several minutes prior to 1:15