Decline to investigate or not finding a prima facie criminal offence? Declining to investigate would be unusual and in most provinces the victim would have recourse to complain to a civilian oversight authority.
Typically, police would not keep a victim's or suspect's employer in the loop one way or the other, but seeing as the alleged offence took place on the employer's property, I can see the foundation for a formal agreement between the involved levels of government or agencies. In terms of sharing or turning over investigative files, turning it over to someone in the CoC might be problematic from a privacy point of view (I say this not knowing all the ins and outs of the various privacy laws). If I was an MP and wanted a civilian police file for investigative purposes, I would be inclined to cover all my bases by getting judicial authorization via a warrant/production order.