Police have arrested a suspect in the case of the Columbia State Bank theft.  46 year old Gary Peterson of Mitchell was arrested without incident in Stayton, Oregon yesterday afternoon about 4 o'clock.  Allegedly, Peterson walked into the  Northeast Third Street branch Monday morning, demanded money and got away with it.  Lt. Nick Parker says they are characterizing the crime as a "theft" and not a "robbery" since the suspect didn't show a weapon and didn't threaten anyone.  Efforts are underway to get Peterson back to Deschutes county.