WASHINGTON (AP)— The Pentagon's inspector general is resigning after just over a year in the job and at a time when defense spending has skyrocketed but personnel shortfalls in the oversight office have strained its ability to probe allegations of waste, fraud and abuse.

Claude Kicklighter, 74, took over as the military's top investigator in April 2007. He'll be replaced by Gordon Heddell, the Labor Department's inspector general since January 2001.

The Defense Department announced the changes Wednesday. It's not clear if Heddell, who will hold the post in an acting capacity, will be officially nominated for the position.