Irvin was fighting McIver for his usual place in line to get a haircut in the locker room. He was trying to assert veteran dominance over a new acquired FA, but McIver was at least a five year vet and no rookie. They got to shoving and Irvin went mental and stabbed McIver in the neck with nearby scissors.
Basically McIver was lucky not to have bled to death and Irvin got fined out the ass. I think it got spun as “horseplay”— as if this had ever happened before in like any NFL locker room anywhere.
Instead of being inspired by their “leaders” most of the team was in shock and couldn’t believe what just happened.
Most assume Jerry Jones flat out paid McIver under the table to keep quiet and not press charges against Irvin.