@5-Star-Property-Management0 As a professional hosting company I trust you have your clients properties listed on other sites as well as Airbnb. It seems to me that Airbnb have a nasty habit of finding hosts guilty before they actually look into the problem. It sounds like you know (but are not saying) what the co host problem is. If it is a true safety issue then Airbnb are possibly right to suspend first.
Finally you say you have 100% five star ratings - Why do you say this when you have complained to guests who have marked you less than 5 stars?