SPOILERS ALERT - how did those cops fail to notice the other man inside that car?

Ludacris' character, after Terrence Howard's character steps out of that vehicle, and did none of those officers happen to pick up anything remotely suspicious of that nature let alone suspect that he actually hi-jacked his jeep at gunpoint and is somewhat hiding in that car?

And if they DID notice HIM, why didn't they at all ask HIM to step out of the vehicle as well regardless of how aggressive Howard's character was there?

Plus, what IF Howard's character actually did try sign language and signal somehow that an unwelcome "guest" of a passenger is in that car, will they try and apprehend him also?

And what would happen if say Howard got into an argument longer and got shot and whatnot, would they also search the vehicle and find Ludacris' character there?

Plus, spoiler, once he drives off, Ludacris' passenger somewhat sits up straight and the window isn't fully closed or totally tinted, surely one of the officers must have spotted him somehow?