of a d.c. councilman s chief of staff after he s arrested and charged with accepting bribes. hello, everybody. welcome to news4 at 4:00. i m jim handly. i m pat lawson muse. he is one of the top advisors to jim graham. ted loza has been with the councilman since 1998. this morning, he was taken into custody at his home by federal agents who then searched his office in the wilson building. an indictment unsealed today alleges loza took at least $1,500 in cash to help influence taxi cab legislation. graham is the head of the committee that oversees taxi cab issues. there is no evidence graham did anything wrong, and he tells news4 that he is not involved in any illegal activity. tom sherwood will have much more coming up here on news4 at 5:00. a breakthrough in aids prevention. for the first time an experimental vaccine prevented infection with the aids virus. it is a watershed event in the fight against the deadly epidemic, and it is a surprising result. brian moar rep