Deceptions, cover ups, serve one purpose. In order for deception to work, the intended mark has to elevate the claims of the deciever over his own reasoning ability and sight.

I give no man authority over my mind, my heart, my sight, my freedom to percieve things outside the box of conditioning. Especially self professed 'authorities' that peddle nothing but deceptions. I do not elevate lies over truth. Doublespeak over objectivity. Or the ever shifting sands of claims over the laws of physics, mechanics, chemestry etc,. when the lies have all crumbled, truth will remain. Truth is undestructable. Liars do not know that.
Evidence can be tampered with, certainly. But crimes scenes leave too many clues... can't hide them all. even if they quickly haul off evidence. Some still remains. Enough to connect the dots... Neither can they make those with eyes to see, not percieve.

more on false flags: http://judicial-inc.biz/False_Flags_summary.htm