Sean Penn and Robin Wright's son arrested on drug charges

Sean Penn and Robin Wright's 24-year-old son, Hopper Penn, has been arrested on drug possession charges.


According to reports, a

Nebraska

State Patrol spokesman said Hopper and his girlfriend, 26-year-old

Uma Von Wittkamp

, were arrested on Wednesday afternoon after a trooper stopped their vehicle on Interstate 80.

Authorities said the trooper detected drug activity inside the vehicle and found 14 grams of marijuana, four amphetamine pills and three grams of mushrooms. Penn was charged with possession of a controlled substance and possession of marijuana. Possession of a controlled substance is a felony.