What I Know  "What I Know" is the twenty-sixth episode of the American television drama series "The Killing", and the thirteenth episode and season finale of its second season, which aired on the AMC channel in the United States on June 17, 2012. It is co-written by series developer Veena Sud and Dan Nowak, and is directed by Patty Jenkins. In the episode, the detectives close the Rosie Larsen case, arresting the person responsible; the Larsen family prepares to leave their former home, but not before learning a family member was involved in Rosie's death; and Darren Richmond (Billy Campbell) becomes Seattle mayor only to learn that campaign manager Jamie Wright (Eric Ladin) was involved in Rosie's death. The episode was originally the final episode to air due to show's cancellation, but the show was revived by AMC in early 2013. It is October 5, 2010, Tommy (Evan Bird) and Denny Larsen (Seth Isaac Johnson) play with Rosie (Katie Findlay) while Mitch (Michelle Forbes) packs for the family camping trip. Rosie is not going on the trip, so Mitch gives her instructions for after the Halloween dance. Toting her pink backpack, Rosie pauses at the door to watch Stan (Brent Sexton) conduct business on the phone, then she walks out. In present day, Linden (Mireille Enos) and Holder (Joel Kinnaman) look for Jamie at Richmond's election rally. Gwen (Kristin Lehman) tells them he is late, as is Richmond. Holder calls in a search for Jamie's campaign car. In the parking garage, Gwen tells them that a driver dropped Richmond off at Jamie's grandfather's house. At the house, Jamie finds his grandfather, Ted Wright (Marcel Maillard), talking to Richmond. As Jamie leaves with Richmond, Ted mentions figuring out where Jamie was the night "that girl got killed". Jamie brings Richmond back to the office and informs him that Mayor Adams is conceding. After Richmond demands to know what is really going on, Jamie admits he arranged to plant the Indian bones at the waterfront construction site to hurt Adams' campaign. Chief Jackson and Michael Ames helped and, in exchange, Jamie promised that Richmond would approve the construction of a casino on the site. When Richmond asks what happened to Rosie, Jamie admits to an "accident". In a flashback to the night of October 5, on the Wapi Casino's tenth floor, Jamie, Ames (Barclay Hope) and Chief Jackson (Claudia Ferri) discuss the Indian bones.