I'm sorry, but some guy who thinks the "splotch looks two dimensional" is not going to convince me.
The photograph we have is not great. It looks like a wound to me, and for the life of me, I don't know what some other leyman expects a wound to look like, but let's see what we can assess from the photograph:
The hair has been deliberately parted (so why somebody would insist it was a natural cowlick makes no sense to me) to reveal the mark that is the focal point of the image. The scale and framing make this obvious. We can therefore know the mark was considered significant.
If it were not a wound, and was indeed just a splotch, we would have to ask why the effort was taken to record an insignificant detail.
Those following the thread long enough to remember Robert Prey's...unique sensibilities, will be more than familiar enough with the oft repeated arguments of "the photographer said those weren't their photographs" to know that there were sanitised and unsanitised photographs taken. With more than one photographer taking pictures at different times, one saying "those are not the ones I took" is not the same as saying "they are not of the body", no matter how dearly conspiracy minded folks wish it did.
There comes a point when the ignorance of procedures and process, required to maintain the belief in a conspiracy, begins to look wilful. Suspicions simply don't survive if you understand what the autopsy says, what the testimony says, and why.