Michigan and coach Jim Harbaugh are being investigated by the NCAA for the second time this year.
A low-level staffer with a military background has emerged as one of the linchpins of the NCAA investigation into the University of Michigan's alleged sign-stealing operation, sources told ESPN on Thursday.
Harbaugh has already served a university-imposed three-game suspension this season stemming from alleged recruiting violations during the COVID-19 dead period and for not cooperating with NCAA investigators.
Here are a few answers to questions based on what we know about the developing investigation.