(Portland, OR)  --  Police are searching for a suspect caught on camera trying to slash at a passing bicyclist from the passenger seat of a moving vehicle.  Henry Bosak tells KATU he was riding his bike on a rural road in Washington County Saturday when the suspect reached out their car window with a knife and tried to cut him.  The incident was caught on Bosak's GoPro cameras.  The Washington County Sheriff's Office is investigating.