Even if Oswald weighed 131 lbs, what difference would it make if all Brennan saw at any one time was portions of a clothed man at a sharp oblique angle? 1/4 inch less width of the shoulders? One inch less width of the torso beneath a shirt? Does that head look malnourished?
Khaki would include a light rust color if the two shirts he is alleged to have worn were in sunlight.
Blue Ribbon Commission - 56 Years On and Findings Still Valid
The little prick, head-on, had the thick neck of a weight lifter*
Any observer would likely add a good deal of weight to his estimate
*Or, as Don DeLillo remarked 'a fullback'