A Montgomery Township teenager, accused of sexually assaulting an eleven-year-old girl, has waived his right to a preliminary hearing. That means his case moves closer to trial in Montgomery County Court.  18-year-old Kareem Richardson of Cricklewood Court in Montgomery Township is charged with rape of a child, indecent assault and other offenses.  Court documents say he was arrested last month, and he assaulted the girl repeatedly over a two-year period.