There's a line like this in pretty much every Louis L'Amour book I've ever read. The hero confronts the bad guy or vice versa. They both reach. The hero is faster. "You got me." Says the bad guy with surprise and grudging respect.
Nothing has been photoshopped. Nothing has been "doctored". All they did was adjust the light balance, which makes any darker area appear darker.
The fact is, the officer does not have a magic marker dark line outlining his head and Zimmerman does not have an oozing, deep gash on the back of his head, in the original tape. In the original, I see nothing on the back of his head at all, except in some angles when there may be a tiny bit of shadowing which could be from the way his head is shaped, dirt, or a bruise. When you adjust light balance, any hint of a deeper color for whatever reason, becomes something other than it is.
Again, if Zimmerman was significantly injured, we will see, because surely the police would have photographed his injuries. He was arrested and processed and interviewed. He stated he was being attacked and an officer looks at the back of his head in the video. The police report indicates that medics offered first aid. An investigator wanted him charged and the state attorney got out of bed at night and came down to the station. There are photographs.
Why haven't they been leaked, is my question?