Follow CBSDFW.COM: Facebook | Twitter

BOISE, Idaho (AP) — Idaho’s highest court says one of the two brothers convicted of killing a Texas couple in northern Idaho more than 30 years ago is entitled to a new hearing after justices agreed that prosecutors violated his constitutional rights to a fair trial.

READ MORE: Colleyville Rabbi: 'We Are Resilient And We Will Recover'

Mark Lankford and his younger brother, Bryan Lankford, were convicted of the 1983 beating deaths of 27-year-old U.S. Marine Capt. Robert Bravence and his 25-year-old wife, Cheryl Bravence, of El Paso. Each brother has blamed the other for the crime.

READ MORE: 49ers LT Trent Williams Active For Wild-Card Game At Cowboys

In an opinion issued Monday, the Idaho Supreme Court ruled that prosecutors failed to correct false testimony during Mark Lankford’s second trial and did not disclose that they had made additional promises in connection to a key state witness.

Only Justice Roger Burdick dissented.

MORE NEWS: FBI Dallas Identifies Colleyville Synagogue Hostage Taker As Malik Faisal Akram

(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)