"The evidence to support the charge just wasn't there for the state to go forward," attorney Ron Hanes told The Tampa Tribune in an e-mail. "We were confident of Cato's innocence when we saw the evidence.
"Cato has great respect for the law and has understandably been very concerned about this situation with the team and the league. I know he will work even harder to put this behind him."
June was stopped on Nov. 19, 2007, after he was clocked at 66 mph in a 45-mph zone. Arresting officer Peter Bucher, in the arrest affidavit, said that as he approached June's vehicle, he detected the smell of alcohol.
June refused a breathalyzer test. But the officer subsequently conducted a field sobriety test and noted in his report that June "exhibited clues of impairment." June was charged with a misdemeanor count of driving under the influence.
June signed with the Bucs as an unrestricted free agent in 2007 after spending his first four seasons with the Indianapolis Colts.
Information from ESPN.com's Len Pasquarelli and The Associated Press was used in this report.