NORRISTOWN, Pa. — Bill Cosby arrived today at the courthouse where his lawyers will ask a judge to throw out the only criminal case lodged against him from the dozens of accusations that he molested women.

Cosby emerged from a black SUV just before 9 a.m., dressed in a tan suit and tie. Two men held his arms for support as he walked up a ramp to the Montgomery County Courthouse, and one carried Cosby’s cane. He chatted with his handlers while ignoring reporters’ questions.

The defense will argue that Cosby had a deal with a suburban Philadelphia prosecutor in 2005 that he wouldn’t be prosecuted and should testify freely in accuser Andrea Constand’s lawsuit.

That testimony, released only last year, prompted the successors of former Montgomery County District Attorney Bruce Castor Jr. to reopen the case and ultimately charge the 78-year-old Cosby with felony sexual assault. Cosby has not yet entered a plea.