New information on Matthew Perry’s assistant and two doctors who have been arrested in connection with the ‘Friends’ star’s death. ET’s Kevin Fraizer speaks with Stefan Sacks, an attorney for one of the doctor’s facing charges, who says his client was no longer treating Perry at the time of his death. Plus, Kenneth Iwamasa, Matthew’s live-in assistant, admits that he injected the actor with illegal Ketamine the day of his death.