Mealey's (September 4, 2019, 12:21 PM EDT) -- STAINES-UPON-THAMES, England — British drug maker Mallinckrodt PLC on Sept. 3 said it has finalized a $15.4 million agreement to settle a false claims investigation by the U.S. Justice Department into “legacy sales and marketing activities” by Questcor Pharmaceuticals Inc. before Questcor was bought by Mallinckrodt....