sfgate.com — A Vallejo rapper is facing federal drug charges after being arrested at Sacramento International Airport with 6,000 ecstasy pills hidden in his clothes. Steven Noel Davison, 34, of Vallejo, also known as "PSD," "PSD tha Drivah" and "Stevie Dee," was trying to board a flight to Oklahoma on July 14 when he was selected for a security screening.