San Francisco ? A congressional committee on Friday requested documents from the White House and Pentagon describing how and when the Bush administration learned the circumstances of Pat Tillman’s death.

The House Oversight Committee is investigating why Tillman’s family and the public were misled about the circumstances of his death.

Tillman, a San Jose native, turned down a lucrative new contract with the NFL’s Arizona Cardinals to join the Army following the Sept. 11 attacks. He was killed April 22, 2004, by friendly fire in Afghanistan.

Although Pentagon investigators determined quickly that he was killed by his own troops, five weeks passed before the circumstances of his death were made public. During that time, the Army claimed he was killed by enemy fire.

The committee gave the administration until May 18 to produce the documents.