The dismissed charges included many of the most serious allegations, including conspiracy to commit murder.
He was indicted in 2003 on more than 40 charges, including fraud and conspiracy.
If convicted on all counts, including conspiracy to aid terrorism, he faces at least 20 years in jail.
The judge is also considering to drop other charges including conspiracy and obstruction of justice.
Seventeen Detroit police officers were indicted on federal charges, including conspiracy.
He was charged last week with one count of spying and 18 other offenses, including conspiracy.
He was charged with five felony counts, including conspiracy and trespassing.
In return, the government dropped other, more serious charges, including conspiracy and obstruction of justice.
Each was charged with more than two dozen counts, including fraud, conspiracy and tax evasion.
He was indicated March 16, 1988, on five counts, including conspiracy, fraud and theft.