He said the agency has received about 50 tips about Nassar , who served as team physician for USA Gymnastics at four Olympic Games .
The Michigan State University Police Department has 11 investigators working full time on the case , Chief James Dunlap said at the news conference .
James Dunlap said the agency has received about 50 tips about Nassar , who served as team physician for USA Gymnastics at four Olympic Games .
The Michigan State University Police Department has 11 investigators working full time on the case , Chief James Dunlap said at the news conference .