I'm sure we'll be reading about cops who feared for their lives, as they shot an unarmed man. Maybe they'll blame it on PTSD or the victim. They'll say the smelled marijuana. That's the number one pretext to get around the Fourth Amendment. 
https://www.washingtonpost.com/news/the-watch/wp/2014/03/31/the-drug-war-exception-to-the-fourth-amendment/?utm_term=.9b05b88dd3d7#comments