The demo should have the sb_status output in it and that should tell you the players steam id.

---------- Post added at 11:16 PM ---------- Previous post was at 11:12 PM ----------

Also when exactly was this?

---------- Post added at 11:29 PM ---------- Previous post was at 11:16 PM ----------

Lets see what we can get
Code:
L 05/08/2012 - 18:08:45: "bgsports96<5><STEAM_0:0:39870133><>" connected, address "67.84.0.154:27005"
L 05/08/2012 - 18:08:46: "bgsports96<5><STEAM_0:0:39870133><>" STEAM USERID validated
L 05/08/2012 - 18:09:28: "bgsports96<5><STEAM_0:0:39870133><>" entered the game
L 05/08/2012 - 18:09:29: [SBSRC] Player "bgsports96<STEAM_0:0:39870133>" is not banned.
L 05/08/2012 - 18:09:30: "bgsports96<5><STEAM_0:0:39870133><Unassigned>" changed name to "MexN00B "
L 05/08/2012 - 18:09:37: "MexN00B <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:09:40: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "Evil "
L 05/08/2012 - 18:09:45: "Evil <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:09:50: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "Mr. Dark Fox (SourceTV) "
L 05/08/2012 - 18:10:00: "Mr. Dark Fox (SourceTV) <5><STEAM_0:0:39870133><TERRORIST>" changed name to "DėMųNLoRd "
L 05/08/2012 - 18:10:11: "DėMųNLoRd <5><STEAM_0:0:39870133><TERRORIST>" changed name to "noob "
L 05/08/2012 - 18:10:23: "noob <5><STEAM_0:0:39870133><TERRORIST>" changed name to "Walkthrough!# "
L 05/08/2012 - 18:10:33: "Walkthrough!# <5><STEAM_0:0:39870133><TERRORIST>" changed name to "Powerslave :3 "
L 05/08/2012 - 18:10:43: "Powerslave :3 <5><STEAM_0:0:39870133><TERRORIST>" changed name to "Bad_Aguia "
L 05/08/2012 - 18:11:02: "Bad_Aguia <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:11:04: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "CABS ARE HERE "
L 05/08/2012 - 18:11:11: "CABS ARE HERE <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:11:14: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "noob "
L 05/08/2012 - 18:11:21: "noob <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:11:24: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "JohnnyB "
L 05/08/2012 - 18:11:32: "JohnnyB <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:11:34: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "Lmaonade "
L 05/08/2012 - 18:11:41: "Lmaonade <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:11:45: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "krspy "
L 05/08/2012 - 18:11:52: "krspy <5><STEAM_0:0:39870133><TERRORIST>" changed name to "bgsports96"
L 05/08/2012 - 18:11:55: "bgsports96<5><STEAM_0:0:39870133><TERRORIST>" changed name to "CABS ARE HERE "
L 05/08/2012 - 18:12:05: "CABS ARE HERE <5><STEAM_0:0:39870133><TERRORIST>" changed name to "Lmaonade "
L 05/08/2012 - 18:12:09: "Lmaonade<9><STEAM_0:0:24305386><TERRORIST>" say "hacker"
L 05/08/2012 - 18:12:15: "Lmaonade<9><STEAM_0:0:24305386><TERRORIST>" say "and impersonator"
L 05/08/2012 - 18:12:15: "Lmaonade <5><STEAM_0:0:39870133><TERRORIST>" changed name to "PhiL "
L 05/08/2012 - 18:12:19: "PhiL <5><STEAM_0:0:39870133><TERRORIST>" disconnected (reason "Disconnect by user.")
I am going to perma this noob