Holmes' Testimony

[LR Trotter]

Baker appears in the Hughes film trailing the first blue impala convertible as it makes the turn onto Houston from Main St and travels a short distance before the film cuts.
In the background at extant Z232,the front end of the first blue impala convertible aligns with the last wall hole, plotted from Zapruders LOS.
At that point, it has traveled 96.5ft from the Main/Houston St corner.
Baker in Hughes is actually trailing the 1st blue impala convertible by approx 5ft.
The blue impala is 17.5ft in length.
At Z232, Baker is approx 96.25ft - 17.5ft - 5ft = 73.75ft down Houston St.
The average motorcade speed down Houston is 9.3mph
At Z232, Baker is 81 frames until extant Z313 (4.42seconds) @ 13.671ft per sec (9.3mph) = 60.42ft
At extantZ313, Baker is 134.17ft (73.75 + 60.42ft) down Houston St.
Houston St. building corner to building corner = 200ft
At extant Z313, Baker needs to travel 200 - 134.17ft= 65.83ft to hit the corner of Houston and Elm St.
An assumption that he remained on the outside of the motorcade as he traveled to his final parking spot is being made, as I have never heard of him weaving between the motorcade to get to his parking spot.
This assumption puts his Elm St radius travel at a distance of 87.5 ft.
His total distance traveled from extant Z313 = 65.83 + 87.5 = 153.33ft.
153.33ft/13.671ft per sec (9.3mph) = 11.21 seconds

Mr. BELIN - All right. After the [size=12]third shot,[/SIZE] then, what did you do?
Mr. BAKER - Well, I revved that motorcycle up and I went down to the corner which would be approximately 180 to 200 feet from the point where we had first stated, you know, that we heard the shots.
Mr. BELIN - What distance did you state? What we did on Friday afternoon, we paced off from the point you thought you heard the [size=12]first shot[/SIZE] to the point at which you parked the motorcycle, and this paced off to how much?
Mr. BAKER - From 180 to 200 feet.
Mr. BELIN - That is where you parked the motorcycle?

After a shot at extant z232, Baker would have been approx 214ft from his parking spot.
After a shot at extant z313, Baker would have been approx 153.3ft from his parking spot.

From my reading comprehension of MrDavidson's calculations of distance traveled and it's timing along Houston St from Main St to Elm St by DPD MotorcycleOfficer ML Baker, it appears that film/photo comparison indicates OfficerBaker's exact location at Zfilm232. However, it appears as though the timing estimate for the approximate 214ft distance from his location at Zfilm232 to his parking spot is calculated by estimating his speed to be 9.3mph, based on the average motorcade speed for the same location/distance. And, it also appears to be some reliance on filming/frames per second to determine said average motorcade speed. These calculations place OfficerBaker's location at Zfilm313 approximately 153.3ft from his Elm St parking spot, a distance that includes an outside turning radius estimate of 87.5ft, rounding the corner beside the motorcade traffic from northbound Houston St to westbound Elm St, and then parking near the divider between old Elm St/parking area access, and the Elm St thoroughfare, as seen on film/photo.
OfficerBaker reported that "Well, I revved that motorcycle up and I went down to the corner which would be approximately 180 to 200 feet from the point where we first stated, you know, that we heard the shots." Although the initial question refers to after the third shot,his response indicates a 180 to 200 feet distance, as measured shortly before his testimony, from where he thought he heard the first shot to the point where he parked the motorcycle. So, revved up indicates an increase in speed, but exactly how much of an increase in speed? And, for how much distance traveled?
Assuming an increase in speed of 5mph for 127.5ft (214ft-87.5ft) from his approximate spot at Zfilm232 to the Elm St intersection, but decreasing his speed to the estimated motorcade average to 9.3mph for the outside turning radius of approximately 87.5ft would cut about 3.3seconds off his estimated time of arrival at his parking spot. The trimmed 3.3seconds is based an estimated total time, for the approximately 214ft distance traveled by OfficerBaker from Zfilm232 to his motorcycle parking spot, of about 15.7seconds @ 9.3mph, versus an estimated speed of 14.3mph for 127.5ft (214ft-87.5ft). That would make an estimated time of approximately 12.4seconds travel time for OfficerBaker from his approximate location, as per MrDavidson's calculations at Zfilm232, to the Elm St motorcycle parking spot. So, a second or so here, and a second or so there, will likely equal 3seconds or so at some point.
Accordingly, if OfficerBaker's approximate location on Houston St when he thought heard the first shot was 200 feet,instead of 180 feet, from his motorcycle parking spot, he would have been approximately 112.5ft (200ft-87.5ft) from Elm St. That said, there likely is a time element, although miniscule, to convert a sound to a gun shot, even for a trained police officer and experienced hunter. And, if relying on evidence of a shot fired relative to a Zfilm frame, with an estimate of a weapon/ammunition velocity of speed of sound x two, maybe the relative distance from the shooter, or shooters, to the victims, as well as the distance from OfficerBaker to the origin of the shots can be reliably estimated.
For clarification, this is not by any means an effort meant to attempt to out calculate anyone. Especially anyone that has applied sound reasoning to calculations. These posted estimates are to simply illustrate what to me can be variances. And, said calculations rely on, and appreciate the posted and researched calculations of ChrisDavidson.