In the '90s, Kato Kaelin became one of the most infamous houseguests of all time. Kato was living in O.J. Simpson's guesthouse when Simpson was charged in the murder of his ex-wife, Nicole Brown Simpson, and her friend, Ronald Goldman. Kato became a household name when he was called to testify during Simpson's trial—dubbed the "trial of the century." Now, 17 years later, Kato shares what he's doing today and reveals how the trial changed his life.