Assemblywoman Mary Hayashi voted on hundreds of bills last September. She returned to the Capitol last week as leader of a powerful committee. In between, her lawyer says, a benign brain tumor affected her judgment and contributed to a shoplifting arrest. The Castro Valley Democrat declined Monday to discuss the brain tumor, when it was diagnosed, or what role it played when she walked away from a Neiman Marcus without paying for nearly $2,500 in clothing – a pair of leather pants, a black skirt and a white blouse. Hayashi's attorney, Douglas Rappaport, said Friday that a brain tumor impaired...