My question involves criminal law for the state of: Michigan

Nearly 2 months ago I was apparently charged with misdemeanor misuse of a firearm (I'm a FLEO) by local police (received no papers/citation etc). They questioned me then confiscated my service weapon and I've been placed on limited duty awaiting my court notice. It's been a long time and I'm wondering if they're going to send me anything at all. Is there a statute of limitations on being formally charged? Or are they just playing a jurisdiction game? Not having my service weapon has placed serious limitations on my job effectiveness and I'm wondering if there's anything I should be doing to resolve this?