The Indiana attorney general is asking the state Supreme Court to decide whether a northeastern Indiana boy convicted as an adult at age 12 of killing his stepfather should receive a new trial.

The attorney general's office announced Thursday it was appealing an Indiana Court of Appeals ruling from December that said a county judge improperly decided a week after Paul Gingerich's arrest that he could be charged as an adult.

Gingerich is serving a 25-year sentence after pleading guilty to conspiracy to commit murder in the killing of 49-year-old Phillip Danner in 2010.

Attorney General Greg Zoeller says he's concerned about the legal precedent of a plea agreement being overturned on appeal.

Gingerich's defense attorney wasn't immediately available for comment.