** FILE ** Sen. Robert Casey Jr., D-Pa., is seen during a news conference on Capitol Hill in Washington, in this Feb. 3, 2011, file photo. The Senate passed a resolution this week urging an international probe into war crimes allegations. Casey, who introduced the Senate resolution, said that a "state of denial" exists in the Sri Lankan government that is "not helpful" in achieving accountability for the bloodshed. (AP Photo/Alex Brandon)

Photo by: Alex Brandon

** FILE ** Sen. Robert Casey Jr., D-Pa., is seen during a news conference on Capitol Hill in Washington, in this Feb. 3, 2011, file photo. The Senate passed a resolution this week urging an international probe into war crimes allegations. Casey, who introduced the Senate resolution, said that a "state of denial" exists in the Sri Lankan government that is "not helpful" in achieving accountability for the bloodshed. (AP Photo/Alex Brandon)