Why was Spiro Agnew impeached?

Spiro Agnew was infamous for being corrupt. He was the only vice president to resign his office because of criminal charges such as: Bribery, Tax Fraud, Extortion and conspiracy. He was also the first Greek American to become Vice President. When Agnew resigned, he was replaced by Gerald Ford, who would then become the President of the United States when Richard Nixon resigned. Gerald Ford is the only United States President who was not elected by voters for the Office of President or Vice President.