He served as the health care fraud coordinator and environmental law enforcement coordinator for the U.S. Attorney 's Office , and was a prosecutor in other types of cases .
In 1991 he became assistant United States Attorney , litigating both civil and criminal cases .
He served as the health care fraud coordinator and environmental law enforcement coordinator for the United States Attorney       , and was a prosecutor in other types of cases .
In 1991 he became assistant United States Attorney , litigating both civil and criminal cases .