BOSTON (AP) — The Boston-based 1st U.S. Circuit Court of Appeals has vacated a witness tampering charge against a Maine man convicted of mailing fatal cyanide to an Englishman.

But the decision, dated Friday, doesn't change the 25-year prison sentence for Sidney Kilmartin of Windham.

He's serving a separate 25-year sentence for mailing the cyanide, along with several concurrent 20-year sentences on other counts related to the case.

Kilmartin is currently serving his sentence at a federal detention center in Kentucky.