Pot activists in Oklahoma are rallying around a Bartlesville veteran whose grandmother turned him in for allegedly growing marijuana.

Austin  Eugene Constuble, 31, of Bartlesville, is accused of cultivation of a controlled substance-marijuana, a felony punishable by 20 years to life in prison in Oklahoma. 

Constuble is a military veteran who claims he uses marijuana for medical reasons. 

According to an affidavit filed in Washington County District Court, Constuble's grandmother called the police to report he was growing pot in a storage building on her property.

Police discovered 11 marijuana plants growing in 5-gallon buckets in the building, as well as growing lamps and hand-written notes about the plants.  

Constuble is slated to appear in Washington County District Court on Sept. 5. Supporters have launched a Facebook campaign to raise awareness about his case.