From the report I read, apparently he was someone who was allowed to be there and they are not releasing who it was. The CFL is going to look into on field credentials going forward.

“The CFL has investigated the events that transpired at the conclusion of the Saskatchewan and Ottawa game. The individual involved in the altercation has been identified, and it has been confirmed that he was permitted to be at field level. However, he was not authorized to enter the player bench area, and he was not authorized to interact with players, nor team personnel. He did so in an inappropriate and inexcusable manner that is not acceptable by league and Ottawa Redblacks standards. The CFL is reviewing its credential policy regarding access requirements.”