BOSTON (AP) -- A former Massachusetts treasurer has agreed to pay a $100,000 fine in exchange for prosecutors dropping a corruption case.

Tim Cahill was accused of scheming to use $1.5 million of state lottery money for an ad campaign designed to boost his 2010 gubernatorial campaign.

Cahill's first trial ended is a mistrial in December when a jury was unable to reach a verdict.

A person with firsthand knowledge of the agreement said Cahill will not face retrial. The person spoke on the condition of anonymity because the agreement has not been presented to a judge yet.

Prosecutors from state Attorney General Martha Coakley's office and Cahill's lawyers are scheduled to outline the agreement to a judge Friday afternoon.

Cahill, who ran as an independent, finished third.

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