Bates was contacted by Chloe O'Brian from CTU LA during the final hour of Day 5. Chloe told him that she had an important recording of President Logan which he needed to hear, but Bates was initially very opposed to listening to it because it was taken secretly. With Karen Hayes and Bill Buchanan listening, Chloe played it anyway, and they all heard President Logan threaten the First Lady and incriminate himself in the Sentox nerve gas conspiracy. Bates quickly notified the proper authorities. President Logan was discreetly taken into custody by his own Secret Service agents and Federal MarshalHoltzman at the end of his memorial speech for David Palmer.
Background information and notes
This character is not named in the show, but the script for his episode names him as "Bates".