(Happy Valley, OR)  --  The driver of a TriMet bus that ran over and killed a 60-year-old man near Clackamas Town Center is on leave while police investigate.  Oregon State Police say Elias French fell under the back wheels of the bus as it was pulling away from a stop at 82nd Avenue and Causey Way Wednesday evening.  The driver, 46-year-old Jason Wilhelm, will also undergo mental-health counseling.