Me and friend were playing competitive multi and a guy from our team was floating really high on the map and it wasn’t from an ability or something like that so I assume he was a hacker. Pretty sad that something like that happened since supposably the Game is protected against cheaters.
For the moment we recommend heading over to https://aka.ms/HaloPlayerReport and file a report against the player you encountered, video clips are extremely helpful in these cases.
Great! Thank u 
I don’t have the clip but It’s good to know there is a way to help