Examiner.com radio columnist Brad Kava reports that KGO-AM’s Gil Gross has stopped doing endorsements of a law firm after learning the attorney behind it had been convicted of statutory rape. He also found that the company’s Better Business rating had dropped from an A to a D.

Gross told Kava that he did his homework before doing commercials for the firm, but dropped the sponsor after he had learned about the firm’s problems from a listener’s e-mail.

“It’s just not something I want my name on,” said Gross, who has refused other ads in the past.