Forum:Cant Find Garrus

Somehow I seem to have missed Garrus.. The last thing that the checklist says is that he went to the med center, but when i go there the firefight doesnt spawn.. I also somehow managed to get Wrex before Garrus and i think that has something to do with it. the game says that because i already found the quarian i no longer need Garrus's information about Sarin but that he may still be helpful in the fight against Sarin and that I should talk to him if "I happen to run into him." I have searched everywhere on the station and cannot find him! Anyone have any ideas? (btw, this is the Xox 360 version)