Case dropped for 4th executive of firm

Federal prosecutors dropped fraud charges yesterday against a fourth executive of the pharmaceutical company Stryker Biotech, effectively closing a high-profile felony case against representatives of the Hopkinton-based company. Mark Philip, the former president of Stryker, and three former sales managers were accused of committing fraud against surgeons by promoting medical devices beyond their approved use. But just as a trial for the managers began, prosecutors dropped all charges after apparently concluding that no fraud had occurred. Philip’s case had been separated from the others because of a legal technicality, and charges against him were dropped yesterday.