Former Brazilian president Luiz Inacio Lula da Silva has been found not guilty of obstruction of justice.
He is already serving a sentence on other corruption charges and faces still more.
Judge Ricardo Augusto Soares Leite ruled there is insufficient evidence to convict da Silva and others of attempting to interfere with a corruption investigation involving state-run oil company Petrobras.
He and others were accused of trying to buy a former Petrobras executive’s silence.
Da Silva was convicted last year of trading favours with a construction company also involved in the scandal in exchange for the promise of a beachfront apartment.
Both cases are part of the Car Wash investigation in which prosecutors allege politicians granted favours and state contracts to companies for bribes and campaign contributions.