More details are emerging about the alleged Michigan football sign-stealing scandal that has enveloped head coach Jim Harbaugh’s program. ESPN is reporting that the NCAA is expected to get bombshell evidence as early as this week that links suspended Michigan staffer Connor Stalions with prohibited surveillance of opponents over the last three years.

ESPN college football insiders Pete Thamel and Mark Schlabach are reporting that Stalions “purchased tickets in his own name for more than 30 games over the last three years at 11 different Big Ten schools, sources at 11 different league schools told ESPN”

Sources also tell Thamel and Schlabach that the Michigan football sign-stealing evidence “includes both video evidence of electronics prohibited by the NCAA to steal signs and a significant paper trail” and that “Stalions forwarded the tickets he bought to at least three different people in different areas of the country, sources say, which hints at the breadth of the operation.”

At least one Big Ten school is submitting surveillance video of a game where Stalions purchased tickets that allegedly capture someone sitting in the seat and pointing their smartphone at the sideline across the field. The report also notes that the tickets — purchased on Stalions’ personal credit card — “fall into a seat location pattern — somewhere around the 45-yard line and raised up enough for a clear view of the opposite sideline.”

One of the most recent ticket purchases, according to the report, was for Saturday’s Penn State vs Ohio State, with seats bought on both sides of the field. After the scandal broke last week though, “the tickets purchased by Stalions were not used on Saturday.”

Neither Jim Harbaugh nor the University of Michigan are commenting on the new football team sign-stealing scandal report, as it is the subject of an ongoing investigation. The institution did suspend Connor Stalions without pay last week, though.

The Michigan football team, now No. 2 in the latest AP poll and currently the favorites to win the championship, next face Purdue on Saturday, Nov. 4.