Alright. I've taken the time to look over your application to give you my full review on it. Here are the things I found wrong, or what you could improve on, and the pros and cons of you becoming a staff member.
Wrongs:
Rdm scenario; You should realize that causing damage to a player is also considered rdm, and that is a very specific situation and rdm can be in very many situations that you have not stated.
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NLR; What you first explained would be revenge rdm, on top of nlr. A different scenario would have fit better, such as the second one. Not sure why both are there.
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"Explain how you would handle the following situation:
Player x accuses player y for rdming him, the console log shows that player y killed player x."
I don't think you read the question correctly, please read it in more detail and realize the situation.
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2nd situation; You would also need to make sure the kills weren't rdm or revenge rdm etc.
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Overall review:
Pros:
Friendly person
Good at listening to instruction
Cons:
Could understand rules better
As long as you have no recent warnings and look over what I've said above, its a

from me as long as you have no recents!