VANCOUVER -- A student left home to go to his university's library on one July day in 2007. He was never seen again. Police involved in the 14-year-old missing persons case say they still believe someone may know what happened that day. Asim Chaudhry had told his family he was going to study at the library at Simon Fraser University. The 24-year-old left their home in Burnaby on July 20, presumably heading where he said he was going. Police know he regularly took the 135 bus from home to reach the university campus, and they know he reached the area of Production Way-University Station.