I only got a screenshot, but it can't really proof he kills.
What I usually take a Screenshot of is:
StatusJust to prove it's his ID and that he was on RND
The beginning of Damage logs (and more if I need to)I make sure that the text that says "Damage logs:" at the very beginning is on the SS so that there isn't any doubt that there could have been something before to provoke the one who is on trial.
If you can't fit the proof you need along with the beginning of the damage logs, then simply just continue to take SS's of the damage logs until you've reached the proof you need.
*For a little more clarity, check
here to see the example I wrote out regarding what was stated about damage logs.
ChatIf the player who is accused of whatever has said anything that could further support the report, I always like to add that in as well (though sometimes it's necessary to include what they've said for certain reports (racism, threats of DDOS, etc))
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That's all I can think of as of right now.
If you need more help, check out
Deacon's Guide on how to make a report.