Giardello then offered Kellerman a choice. He could face a jury trial and possibly win, but he, Lewis, and Stivers would certainly be fired once their false reports came to light; or he could resign and the other two could keep their jobs. Kellerman resigned and later became a private investigator, as seen in Season 7, but lost the respect of most of the squad. In his new work, Kellerman found himself opposed to his old coworkers when he worked to aid in the defense of a pair of teenagers who committed infanticide. In the end, however, Kellerman got to the truth and redeemed himself in the eyes of some of his former coworkers, particularly Falsone, by anonymously providing them with information that boosted their case, even though it was not enough to prosecute. For most of this story, Falsone referred to Kellerman in an angry way and used his last name, but in their last conversation implied that Kellerman had slipped them the information and in perhaps a sort of redemption, calls him "Detective".