The judge has been banned from the legal profession for 11 years.
Baltasar Garzon, 56, is best known for his efforts to extradite the former Chilean dictator Augusto Pinochet from London to face trial in Madrid.
He is also accused of exceeding his authority by wanting to investigate Franco-era disappearances.
That would violate a 1977 amnesty on crimes committed during General Franco’s rule.
Baltasar Garzon believes that no amnesty can cover crimes against humanity.
The judge also faces a third charge, of allegedly dropping an investigation into the head of Spain’s biggest bank, Santander, after receiving payments for a course sponsored by the bank. No date has been set for that trial.
The prosecutions have been brought by private parties.
Seven judges at the Supreme Court in Madrid have been hearing the evidence.
Image source: Wikimedia Commons President-elect Donald Trump celebrated his election victory at the Ultimate Fighting…
Millions of voters across the US chose to return Donald Trump to the White House…
Donald Trump declares victory in the US election as he addresses jubilant supporters in Florida.…
Stocks around the world are rising as Donald Trump appears to be on the cusp…
Donald Trump has won Pennsylvania, North Carolina and Georgia and taken a lead over Kamala…
Quincy Jones, the celebrated musician and producer who worked with Michael Jackson, Frank Sinatra, Ray…