The parents of the slain Army Ranger and professional football player Pat Tillman are calling for a review of the new US commander in Afghanistan’s role in the cover-up of their son’s death. The military initially said Tillman was killed by Taliban fighters but later conceded he died by friendly fire. Lt. Gen. Stanley A. McChrystal, named this week to replace General David McKiernan, has been accused of urging top generals to ignore the evidence surrounding Tillman’s death. In a statement, Pat Tillman’s mother, Mary Tillman, called for “careful scrutiny” of Lt. Gen. McChrystal at upcoming confirmation hearings.