Former Colombian President Álvaro Uribe was sentenced Friday to 12 years of house arrest for witness tampering and bribery in a historic case that gripped the South American nation and tarnished the conservative strongman's legacy.

Mr. Uribe, a towering figure in Colombian politics, was accused of trying to bribe a former paramilitary to retract testimony damaging to him.

Uribe, who denies any wrongdoing, has pledged to appeal following his conviction for witness tampering and bribery.