The Pentagon's inspector general is reviewing the Army's probe into the friendly fire death of former professional football player Pat Tillman, a spokesman said. Tillman's parents welcomed the decision. "The other investigations were frauds," Tillman's father, Patrick Tillman, told the San Francisco Chronicle. "People above should have been punished," added Mary Tillman, referring to her son's commanding officers. In response to an inquiry from the newspaper, the Pentagon confirmed that the Army had requested the investigation be reviewed. Pentagon inspector general Gary Comerford did not provide further detail, but said elements of the military frequently seek such reviews. Tillman, who played for the Arizona Cardinals, left football after the attacks of Sept. 11, 2001, to join the Army with his brother.