Former Arizona Attorney General Grant Woods, once an aide to the late Senator John McCain, died Saturday at the age of 67.
His unexpected death was announced by his wife Marlene Galan Woods through a public relations firm.
A cause was not revealed publicly.
'Grant was the love of my life. My best friend. My heart is broken,' his wife said in the statement. 'I just cannot believe he is gone.'
Woods was a Republican who changed his registration to Democrat in 2018 due to his frustration of the GOP's direction and alignment with then-President Donald Trump.
During McCain's rise in politics, Woods served as a top aide when he was a congressman and his first chief of staff in the 1980s. He delivered a eulogy alongside now-President Joe Biden at McCain's memorial service in Phoenix in August 2018.
'Grant Woods was one of my best friends,' McCain's widow, Cindy McCain, tweeted on Saturday. 'My only comfort is knowing [he] is laughing and joking with John now and watching over all of us. We will miss you so much Grant. God Bless!'
Woods served as attorney general of Arizona from 1991-1999.
During that time, he helped lead negotiations on a massive nationwide settlement with tobacco companies that continues to help fund the state's Medicaid program. As a result of the deal, Arizona has received more than $1 billion from the settlement agreement since 1998.
After leaving office, Woods returned to private practice and was a highly successful civil litigator in antitrust, fraud, breach of contract and medical malpractice cases. He was often tapped as a special prosecutor in public corruption cases and tried murder cases.