California ? Authorities said Monday they have positively identified some of Steve Fossett’s remains: two large bones found a half-mile from where the adventurer’s plane crashed in California’s Sierra Nevada.

Madera County Sheriff John Anderson said DNA tests conducted by the state Department of Justice positively identified the bones as the remains of the millionaire aviator who disappeared last year.

Anderson has declined to say what bones were found, saying he didn’t want to cause the family further anguish.

Fossett disappeared in September 2007 after taking off from a Nevada ranch owned by hotel magnate Barron Hilton for what was supposed to be a short pleasure flight. Law enforcement, fellow aviators and others launched a costly search that covered 20,000 square miles but turned up empty.