Have you learned how to keep logs, maze? Or do you have a blacklog on your client that you could copy and past into an e-mail? It's actually against the rules to PK and log off. If you are able to send a log to Achernar or maybe Ain through PM or e-mail. The log would be most helpful with the PK and your attempts to contact the person after the kill.
That being said, it's possible that the person became invisible/hidden or other wise disguised and you would have no way of knowing since you're dead.
Also, if you haven't learned how to log, post which client you use and I'm sure someone would be able to help you set it up. It really is important to keep logs for times likes these.
Sorry you had a bad experience!