FILE - In this May 13, 1987 file photo, Detroit Pistons coach Chuck Daly hugs guard Joe Dumars after the Pistons won the second round of the NBA playoffs, defeating the Atlanta Hawks 104-96, in Atlanta. The FBI investigated a series of threatening letters sent to Daly at the height of his team's success during the 1989-90 "Bad Boys" championship era, newly released government records show. (AP Photo/H. Joe Holloway Jr., File)