By Kyle Schwab Staff Writer kschwab@oklahoman.comThe final defendant in a felony case involving the sale of illegal synthetic marijuana at Oklahoma City head shops was sentenced Wednesday to 20 years on probation for laundering proceeds. John W. Roddy, 67, of Edmond, pleaded guilty in Oklahoma County District Court to money laundering and structuring a financial transaction to avoid a reporting requirement. At the time of his arrest last year, Roddy was described as a principal operator at two Mr.Read more on NewsOK.com