In the United States, treason has no statute of limitations. Under 18 U.S.C. § 3281, any offense punishable by death can be prosecuted at any time without limitation. Treason, as defined in 18 U.S.C. § 2381, is punishable by death or imprisonment for not less than five years, making it a capital offense. Therefore, federal treason charges can be brought at any time, regardless of when the alleged acts occurred.
They will probably say they can't prosecute due to statute of limitations.
~ Grok