A Youngsville man was busted on Interstate 49 after about a half pound of methamphetamine was found in his vehicle on Dec. 15, according to a news release from St. Landry Parish Sheriff Bobby Guidroz. The methamphetamine was found after a traffic and after probable cause was made to search the white GMC Yukon, Arrested was Johnathan Bourque, 35, of the 100 block of Wind Chime Drive, Youngsvill…