"Controlled substance" means a drug, substance, or immediate precursor in Schedules I through V of section 152.02. A felony drug conviction in Minnesota bars you from legally owning a firearm for life.Minnesota makes it illegal to possess a controlled substance without a valid prescription. Penalties vary according to the class and amount of the drug. Being charged with drug possession can be a complex legal process. Possession of Schedule V controlled substance. The MN Judicial Branch has created a video to explain the criminal expungement process, including how to fill out the forms, service, and filing. A 5th degree controlled substance offense is usually charged as either a felony or a gross misdemeanor, you must speak with a lawyer as soon as possible. Contact Minneapolis drug crimes defense attorney Christopher Keyser at 612-338-5007 for a free consultation regarding any Minnesota drug charges.