re: what did the Michigan OC do to get the FBI involved in the investigation?

There is a paper trail of Ticket Purchases.
There is a paper trail of Ticket transfers courtesy of 9/11.
Nearly all of the Universities in the BigTen involved have produced surveillance video of individuals sitting in said seats recording the game.
Not only will the Michigan have it's season 21-23 games vacated, they will also be handed the death penalty.
SMU received the death penalty due to a booster paying it's athletes.

The NCAA is caught between a rock and hard spot. Damned if they do and damned if they don't. If they don't give Michigan the Death Penalty, then this gives SMU a class action lawsuit against the NCAA for punitive damages against their program.

In addition it hurts Harbaugh's case. He already has been proven to be a cheater during the Covid Season. A second cheating violation does not bode well for him. Plus Harbaugh will recieved a third violation as a repeat offender.

It is way past allegations.

There was an intial report from either CBS or ABC that NCAA was fast tracking the investigation on this.

What is interesting is that the NCAA has a master spreadsheet detailing everything. This extensive of a spreadsheet indicates they have already been investigating this for a long while. It was enough sufficient evidence that the BigTen commissioner gave Harbaugh a 3 game suspension. That is the max under BigTen bylaws. A longer suspension would require a meeting of all trustees from all the BigTen Universities.

Add to this TCU recevied a heads up on last years CFP against Michigan about the sign stealing. TCU then threw out fake signs to confuse Michigan. It worked perfectly, yet TCU true colors were shown against Georgia.

And before this tip, The NCAA changed it's rule about Head Coaches. They made Head Coaches 100% responsible for everything that happens under their regime. Some say this is a coincidence. I am not inclined to believe it is coincidence. NCAA needed the rule change to make Harbaugh fully responsible.

Also about a 2 weeks after this broke, either CBS or ABC briefly reported that the NCAA is fast tracking this.

I will also be surprised if the FBI does not get involved. Cheating to affect the outcome of a game that people bet on. This falls within their purview.

They are already involved in the illegal access of sports computers at Michigan. I am wondering if the two are now related. What was the coach looking for?