Police Experts:

Countless times in my career, I have had police officers say on the stand “due to my education, experience and training” the defendant was dealing drugs usually in response to how much money the defendant had on him at the time of arrest or if the defendant had more than one phone or had certain paraphernalia.  Despite not having any eyewitness testimony or other compelling evidence, the guy gets convicted. Doesn’t matter that he just sold his car for $4000 or had the extra phone for work in addition to his personal phone (I know of several police officers and prosecutors that carry two phones for that very reason) or that the guy likes to smoke a joint when he gets home from work (I know, it’s a lot different from having a bourbon) so he buys marijuana and weighs it when he buys it to make sure he’s not getting ripped off, off to prison he goes.

Maybe this ruling will help.

https://www.facebook.com/NACDL/posts/10154374385731395