CASPER, Wyo. — A Massachusetts man who authorities say took part in a prescription drug conspiracy run by a Wyoming doctor has pleaded guilty.The Casper Star-Tribune reports Paul E. Beland pleaded guilty Thursday in federal court to participating in a drug conspiracy that resulted in the death of another person and two counts of unlawful use of a communication facility.The please agreement that Beland, of Oxford, Massachusetts, reached with prosecutors was sealed by the court.