A 50 year-old motorcyclist has been arrested in Healdsburg after injuring himself and another driver in a crash. The crash happened last Thursday afternoon at Healdsburg Avenue and Parkland Farms Boulevard. The vehicle driver suffered moderate injuries while the motorcyclist, Glenn Merrifield, suffered major injuries. Police were able to draw blood from Merrifield with a warrant. Merrifield is being charged for DUI causing injury and possession of a controlled substance.