I'll need video proof of the hack, all we can do is be aware of the name. If you record the hacker, please write the gamertag, server name and possibly the time of the event.
Supersnipers Guidelines on how to report a hacker:
How to Report Hackers
When playing in the game and you come across a hacker here are the guidelines to follow in order to get them banned
1) Get their player name
2) Record the moment so we have video evidence of the event
3) Mark the time and day the player was in the server so the logs can be easier to search
4) Either post the video here or make a post at http://www.halo2vista.com/
Thank you for your cooperation in helping us stop these players from ruining our experience.