Even on a Supreme Court that leans to the right on criminal matters, Justice William Brennan has shown a gift for assembling a majority behind liberal decisions. He did it again last week in a 5-to-4 ruling that fortified a defendant's Sixth Amendment right to counsel. In the case of a convicted car thief, Perley Moulton Jr., the court ruled that Maine authorities should not have used as evidence statements he made, after his indictment, in conversation with his alleged partner, a wired government informant.
Prosecutors argued that the exchange had been taped not to obtain evidence in the theft case...