Bear, a 2-year-old black Labrador retriever, was the troublemaker of the shelter. He was rambunctious and would hardly sit still. He was becoming a problem for workers at the Warren County humane society. He was exactly what Dustain Vance was looking for. Bear was an unwanted, mischievous dog when Vance, head trainer for Advance Canine Academy in Scottsville, adopted and trained him. Now, Bear is in his first week at his new home in Alabama, where he’s a narcotics canine for the Tuscaloosa County Sheriff’s Office. Today, Bear discovered a half-pound of marijuana in a package, Vance said.