On February 19 , 2010 , the FBI formally closed its investigation .
Two days later , Senator Chuck Grassley and Rep. Rush Holt called for hearings into the DOJ and FBI 's handling of the investigation .
On February 19 , 2010 , the FBI formally closed FBI 's investigation .
Two days later , Senator Chuck Grassley and Rep. Rush Holt called for hearings into the DOJ and FBI 's handling of the investigation .