(Portland, OR)  --  A man who's accused of killing a bicyclist in a hit-and-run crash in Northeast Portland is facing a second-degree manslaughter charge.  Authorities say Kenneth Britt Smith, Jr. was arrested hours after the Saturday night crash that killed the 38-year-old cyclist.  Police say the victim died after he was struck from behind in the 42-hundred block of Northeast Portland Highway.  Smith was arrested after officers spotted his vehicle in the area of Northeast 97th and Killingsworth.