Here we see McLain in the Dorman film arriving at the intersection of Houston and Elm with the Congressional cars. McLain arrives when these cars arrive but would have had to be at this location long before this point to record BBN's impulses.

In the Dorman film, McLain is in the correct location but at the wrong time to have had the stuck mic located where BBN say's. By the time McLain arrives at this location ALL the shots have already been fired.

Would the proponents of the BBN acoustics findings argue that there were two 1964 Mercury Comet cars at the location of Houston and Elm during the shooting?