Few days ago I watched "The Culture High" (http://www.imdb.com/title/tt1778338/) which highlights the connections between:

- Prison-industry

- Militarization of Police

- Pharmaceutical industry

- and Marijuana prohibition

I highly recommend this flick. It is exceptionally well made in artistic as well as subject-specific regards.

Also watch-worthy are "How to Make Money Selling Drugs" (http://www.imdb.com/title/tt1276962/) which features a similar approach to the subject and "Narco Cultura" (http://www.imdb.com/title/tt2504022/) if you are interested in how this drug-crap even detrimentally influences what's left of Mexican culture.