OK----I will give that beginning from the sidewalk of the house 1026 N. Beckeley at 1:00 PM [which is generous enough] and briskly walking ...using the shortest possible route... someone of average age and size could arrive at the northwest corner of 10th and Patton in 15 minutes.
However- this is the location where it was established that Mrs Markham stood at the time. J D Tippit's patrol car was parked across 10th and some 3 lots [120 ft] east of the intersection. The proposed murder allows no time for an encounter, a discussion at the side of the cruiser, an exit from the car and a subsequent shooting. It also allows no time for the alleged walker to have returned to the front of the rooming house from a reported bus stop some 120 ft north where Oswald was last seen by the housekeeper. So- again, this is like trying to squeeze 10 lbs of time into a 5 lb sack. It couldn't be done so it had to be faked.
In addition..as I have repeatedly pondered ---If this was supposed to be Oswald, where in hell was he going?