Here pages 1 and 2. If older history is required, just say the word.
If by demos and logs you mean gameplay recordings, replays were disabled. I'm not quite sure what you mean by server logs.
To make it easier to find the appropiate line in the log: The leaving message is directly next to the Shop button.
Scam Report Report Type: [Gambling] Gambling fraud or spycrab runner Virtual item type involved: [TF2] Team Fortress 2 Items Accused profile:...
Subject: Makaveli Victim: | steamname: Sailor Mc_Shark | steamID32: STEAM_0:0:55496706 | steamID64:...
Separate names with a comma.