After 17 years, James Stone has perhaps a few more months to wait before he learns whether he will collect up to $1 million for exposing fraud by a government contractor at a now-closed nuclear weapons plant.

A court ordered Rockwell International, now part of aerospace giant Boeing Co., to pay the government nearly $4.2 million for fraud connected with environmental cleanup at the Rocky Flats plant northwest of Denver. Stone, a former employee at the facility, could be entitled to as much as one-quarter of the payment under the federal False Claims Act.