WASHINGTON—A Food and Drug Administration (FDA) chemist and his son were arrested in Maryland today in connection with an alleged $2.27 million insider trading scheme, announced Assistant Attorney General Lanny A. Breuer of the Criminal Division; U.S. Attorney for the District of Maryland Rod J. Rosenstein; James W. McJunkin, Assistant Director in Charge of the FBI’s Washington Field Office; and Elton Malone, Special Agent in Charge, Department of Health and Human Services, Office of the Inspector General (HHS-OIG), Office of Investigations, Specials Investigations Branch. A criminal complaint unsealed today in the District of Maryland charges Cheng Yi Liang, 57, and his son, Andrew Liang, 25, both residents of Gaithersburg, Md., with conspiracy to commit securities and wire fraud, securities fraud, and wire fraud relating to their trading in the securities of five companies: Clinical Data Inc., Vanda Pharmaceuticals Inc., Progenics Pharmaceuticals Inc., Middlebrook Pharmaceuticals I...