Ruben Gutierrez is challenging the constitutionality of a state law that restricts death row inmates from seeking tests that he says will prove he’s not a murderer.

Ruben Gutierrez's lawyers say new evidence tests would help prove he was not responsible for the fatal stabbing of an 85-year-old woman in South Texas.

The Supreme Court on Thursday ruled that a Texas man on death row can bring a federal civil rights claim to challenge the constitutionality of state laws governing DNA testing. […]