(Troutdale, OR)  --  Troutdale police say they've arrested a man who shot a gun into the air after threatening to shoot his girlfriend.  Officers were dispatched early yesterday morning after reports of a gun being shot outside a house in the area of 23rd Street and Southeast Lewellyn Avenue.  Police say there were no reports of property damage, but the shooter and another person were taken into custody.  The accused shooter is facing multiple charges.