Legal Question in Criminal Law in Michigan

A charge has to be issued by the prosecutor within 6 years of the crime date. But in your situation, you might have left out a detail or two. If you refused the breath test at the police station, that is not a "charge" but may have resulted in a search warrant for a blood sample that would be tested by a lab. If that happened, it can take weeks for blood-alcohol test results to come back ... but can now take up to a year for drugs-in-the-blood-sample to come back. In an OWI case, your blood-alcohol level is important evidence, as well as any controlled substances (drugs). That might be what is delaying the charges.