The 5-4 ruling comes in the case of Genovevo Salinas, who was convicted of a 1992 murder. During police questioning, and before he was arrested or read his Miranda rights, Salinas answered some questions but did not answer when asked if a shotgun he had access to would match up with the murder weapon.
Prosecutors in Texas used his silence on that question in convicting him of murder, saying it helped demonstrate his guilt. Salinas appealed, saying his Fifth Amendment rights to stay silent should have kept lawyers from using his silence against him in court. Texas courts disagreed, saying pre-Miranda silence is not protected by the Constitution.