`` I do n't know what happened there , '' Holder tells the Judiciary Committee . AP : " The Justice Department has been investigating whether a top aide to President Obama improperly disclosed classified information about an investigation into Hillary Clinton's use of a private email server while she was secretary of state. Justice Department defends records collection as necessary and limited . Holder said he recused himself because he had been questioned by FBI agents as part of the leak probe . Obama administration has launched several high-profile leak probes .
`` I do n't know what happened there , '' Holder tells the Judiciary Committee . AP : " The Justice Department has been investigating whether a top aide to President Obama improperly disclosed classified information about an investigation into Hillary Clinton's use of a private email server while she was secretary of state. Justice Department defends records collection as necessary and limited . Obama administration has launched several high-profile leak probes .