The blood on the gate was always there. The lead detectives had asked for it to be collected, which wasn’t done. The initial photos of the gate appear to be washed-out, i.e. over lit from the camera flash.
Just wondering here: You believe LAPD detectives/officers conspired to frame Mr. Simpson? Mark Fuhrman, the 17th officer to log in at the crime scene that night, was the only one to see the second glove? Nobody else saw it? Then, when Mr. Fuhrman secretly carried the glove away and later planted it at the Rockingham Estate, all the other officers/detectives went along with it?
Occam’s Razor says, “The simplest answer is often correct”. And I believe it was the fine fictional detective, Mr. Sherlock Holmes, who stated, “When you have exhausted all other possibilities, then whatever remains, no matter how improbable, must be the truth.” Only O.J. Simpson remains.