Brazil's Supreme Court has annulled the trial of a rancher convicted of ordering the 2005 murder of U.S. nun and Amazon defender Dorothy Stang.

The court says in a statement that Vitalmiro Moura was not given enough time to prepare his defense in 2010 when he was sentenced to 30 years in prison . The court says Moura will remain behind bars until he his retried at a yet-to be scheduled date.

Stang was a Dayton, Ohio, native who worked for three decades to preserve the rain forest and defend poor settlers' land rights.

Prosecutors have said that Moura ordered her killing because she blocked him and another rancher from taking over land the government gave to farmers.