Yeah how can we know evidence wasn't planted? I get the feeling if we get a full verifiable video of the cops pulling up on him and finding the weapon and stuff in the same car he's eating McDonald's in, it's not like the gun will be on the passenger seat next to him on chest cam when they walk up to the car. It's not like the video is gonna have him telling them where to find these things. The only way to judge if it seems like he knew the items were there is body language, and the body language of some random person worried about being framed could be the same as the body language of someone knowing the cops would find this stuff