I was wondering is it proper procedure for a LE officer to perform a traffic stop in a marked car yet be in plain clothes??? The reason why i ask is because day before yesterday I seen a sheriffs deputy perform a traffic stop on an older mercury MGM. When he got out of his car he was wearing a tshirt, jeans, brown leather jacket and a ballcap. I've never seen this happen before and i was just curious. Unless the driver of the MGM did something really stupid in front of him.