Topic 2:JFK assassination conspiracy!

What really happened to JFK? well we will never know the real answer to that because it's another thing the government is hiding from us? They say that Lee Harvey Oswald shoot him from the third story of a building when mins. before the shooting people saw him on the first floor and moments after. So tell me how in those few mins. he ran up there at perfect timing shot a perfect shot, and run back down stairs before anyone noticed. i don't think so. if Oswald shoot him he would have to shot him in the back. which they said he did. But the autopsy's and pictures that passer bys took show that he was shot from the front of the head not the back. other witnesses say that they saw a man in a grassy field behind a fence in front of JFK. and some say they saw a man in the sewer in front of JFK. Clearly Oswald did not kill him but was blamed for it anyways because the government had to take someone down to look like the good guys!