(Portland, OR)  --  Police say the subject of a ten-hour manhunt in Northeast Portland Sunday was armed with a BB gun.  Authorities say 51-year-old Michael Ervin Grubbe was booked on three outstanding misdemeanor trespassing warrants late Sunday night, but has since been released.  The pursuit of Grubbe began Sunday morning when officers responded to East Burnside and Cesar Chavez for a report of a man walking around with a gun.  He was finally detained around 5 p.m. Sunday.