SPRINGFIELD (AP) – A 56-year-old man has pleaded guilty to helping to distribute $6.7 million in synthetic marijuana.

Federal prosecutors announced Tuesday that Douglas K. Franklin pleaded guilty to conspiracy to commit mail fraud and to conspiracy to commit money laundering.

Franklin’s son, 28-year-old Brandon Franklin pleaded guilty to the same charges in September. Charges against Douglas Franklin’s 26-year-old daughter, Caitlyn Franklin, were dismissed after a pre-trial diversion agreement. They all live in Springfield.

Douglas and Brandon Franklin admitted they sold and shipped products commonly known as K2 that were falsely labeled as incense. They also manufactured and distributed K2 to retail stores in Springfield, Joplin and elsewhere through their business, ThirdEye.

Another co-defendant, 37-year-old DeWayne Barnthart, of Joplin, was put on probation for receiving and distributing misbranded drugs.