San Francisco mayoral candidate Mark Farrell agreed Monday to pay a $108,000 ethics fine after an investigation found that he illegally commingled funds between his mayoral campaign and another committee created to support a ballot measure,

The fine would be largest campaign penalty issued by San Francisco Ethics Commission. Farrell is accused of commingling campaign funds.

Mayoral candidate Mark Farrell has agreed to pay a $108,179 settlement after the San Francisco Ethics Commission found that he violated election laws in his campaign. Why it matters: If approved, it'd be the largest campaign finance penalty in the Ethics Commission's 31-year history,