The Nebraska football program admitted that misused Jonathan Rutledge while he was a special team’s analyst in 2020. Since Rutledge was an analyst, and not an official coaching staff member, should not have been providing “technical or tactical instruction” to the players during practices or film sessions. Nor should he have been doing so during games.
Since Nebraska allowed him to do so, they knowingly violated the limit on the number of permissible coaches as allowed by the NCAA. This is known as the “countable coaches” rule.
Here is a link to the NCAA article on the violation.