LOS ANGELES (AP) - A former Boeing Co. scientist who specialized in anti-missile systems plans to plead guilty to unlawfully retaining national defense information, his attorney said.

Abraham Lesnik, 68, was charged Monday, nearly two years after a federal investigation into whether he misused classified information, prosecutors said. He could receive up to 10 years in prison and a $250,000 fine if convicted.

Lesnik appeared in court, where U.S. Magistrate judge set his bail at $150,000, Assistant U.S. Attorney Michael Zweiback said.

A trial date was set for Aug. 12, but Lesnik's attorney, Marc Harris, said his client will plead guilty.

U.S. Attorney's Office spokesman Thom Mrozek said most of the case was under seal. A charging document alleges Lesnik had unauthorized possession of 10 classified documents and one "top secret" document "pertaining to national defense satellite threat mitigation."

The FBI searched Lesnik's San Fernando Valley home three times in 2006 and confiscated a laptop computer.

Lesnik's Department of Defense security clearance was listed as "Secret, Special Access" until he was terminated by Boeing in 2007, according to a court document he filed to prevent Boeing officials from examining his computer. He argued it contained personal financial, medical and family information.

Calls to Boeing after business hours were not returned Monday.