A longtime South Dakota supporter of legalized marijuana has pleaded guilty to possession of it.

Bob Newland of Hermosa was in a Rapid City courtroom Monday on charges the drugs were found in March in his car after a routine traffic stop for speeding.

Newland pleaded guilty to possessing more than 2 ounces of marijuana but less than one-half pound. As part of a plea agreement, the state agreed to drop a more serious charge of possession with intent to distribute.

Newland is scheduled to be sentenced July 6.