Impeachment in the House is the indictment. The Senate conducts the trial.
In the entire history of the United States, can anyone point to one single solitary instance where a person that was indicted, then DIED before their case went to trial, a trial was held and they were convicted? Beuller? Bueller?
LBJ? Wasn’t he tried and convicted of murder after he was dead?
Of course the Warren Commission went on to pronounce Lee Harvey Oswald guilty after his death and to declare him the lone gunman. 50 years later much of the public still wonders what the truth was.