Frank Sullivan is a man who was suspected of murdering his two daughters, Kedzie and Faye, by setting their house on fire. He punched A.D.A. Jo Marlowe over the notion during his arrest.
Pleading his case to her in lockup, Frank slashed his wrist with a pocket knife he snuck in to prove he didn't care to escape charges if he didn't want to live. He was acquitted when it was proven that the fire was not arson, but instead caused by an electrical fault, identified by expert Dr. Iggy Drexel. (SVU: "Torch")