Todd Richards was the attorney of Mandy during Day 4.
After being apprehended by Jack Bauer and CTU Los Angeles agents, Mandy received a call from Richards to confirm that the pardon signed by PresidentLogan granted her full immunity from all crimes, past and present. She then immediately upheld her part of the deal, and informed the agents that Habib Marwan, their lead suspect, would be escaping via helicopter at the Global Center.
Background information and notes
Todd Richards is very similar to Hervé from Season 5, who likewise was the defense attorney for a female terrorist collaborator (Collette Stenger). Both Hervé and Richards were only heard over the phone, and both verified presidential pardons for their clients.