The mother of the late Pat Tillman, who gave up an NFL career in order to enlist in the Army after the terrorist attacks of Sept. 11, 2001, has called for the removal of former Gen. Stanley McCrystal from a post as co-chair of a commission on military families.

President Obama named McChrystal to the post earlier this week. The retired general will lead a three-member advisory board that will work with corporations and foundations to develop community-based efforts to assist service members and their families. The board also will seek to catalyze debate about ways that the private sector and communities can help.

In 2004, Tillman was killed by friendly fire during an attack in Afghanistan and McChrystal was commander of special operations there. “Considering that we have plenty of evidence indicating that McChrystal was involved in the cover-up of Pat’s death,” Mary Tillman told ABC News, “... he's not the right person for that kind of a job.”

McChrystal admitted in 2009 that he was part of the initial coverup of the details of Tillman’s death.

See more on the story at 44.

For more on Tillman’s death and the coverup, see Steve Coll’s 2004 investigation.