There has never been a United States Supreme Court Justice removed from the bench. If the need arose to do so then Congress would have to do it the only way constitutionally allowed for it, impeachment. Basically, the House of Representatives would have to approve by a simple majority vote articles of impeachment against the Justice, listing their high crimes (felony) or misdemeanors and their recommended punishment for those acts. If they pass they go on to the United States Senate where a trial would be conducted. If the Senate votes, like a jury, to find the Justice guilty of any of the charges in the House articles the Justice is convicted (impeachment refers only to the articles themselves passing and the motion moving forward to the Senate, not to the individual being convicted, in this way impeach functions much like a formal indictment). Once convicted the Senate can pass a motion to remove the individual from the bench and deny them the right to ever hold a public office again. The only justice ever impeached was Samuel Chase in 1805, but he was acquitted in the Senate when it became evident that his politics were the reason for his impeachment, not any ethical or legal lapse.