To get someone banned for hacks we will. Eed to have an actual recording of them doing so. This unfortunately is not enough. In addition to that, please use ouruser reports section on the forums for these matters.
u need to record it to get him banned, a picture isn't enough evidence especially being as vague as this, you cant really even see the background. So he could be in /wild and since you are zoomed in on optifine you could be more than 32 blocks away allowing him to fly. If you want to get him banned u have to post a video.