Cameron Douglas was sentenced to five years behind bars in 2010 after pleading guilty to distributing drugs. His sentence was doubled in late 2011 after he committed several infractions behind bars, including smuggling medication into his cell.
Now, the 34-year-old has opened up about his struggle with addiction in an article for The Huffington Post, criticising the legal system in America for punishing addicts with jail time instead of providing treatment.
"There are half a million other people in the US who, like me, will go to sleep behind bars tonight because of nothing more than a drug law violation... This outdated system pays little, if any, concern to the disease of addiction, and instead punishes it more harshly than many violent crimes.
Cameron is due to walk free in 2018.
"Somehow... No one seems to comprehend that tossing individuals desperate for skills to cope with addiction behind bars does absolutely nothing but temporarily deter them from succumbing to their weakness. Instead of focusing on how many individuals this county can keep imprisoned, why can we not focus on how many individuals we can keep from coming back?," he added.