philadelphia: a judge will let only one other accuser testify at bill cosby's sexual assault trial to support charges the comedian drugged and molested a woman at his estate near philadelphia.the judge's ruling on friday means that prosecutors cannot call 12 other women as `prior bad act` witnesses. bill cosby will stand trial over allegations he sexually assaulted a woman. photo: apthe 79-year-old comedian is set to go on trial in june over the 2005 complaint by former temple university employee andrea constand.prosecutors reopened the case in 2015 after newly released court documents showed cosby admitting he gave drugs and alcohol to young women before sex over a 50-year period.prosecutors had asked the judge to allow 13 other accusers to testify. the defence objected, saying the string of old `casting couch` claims are 'not part of `signature` behaviour.the one witness who can testify says she was assaulted by him in 1996.aap