The empiresco_skins_fbi.zip file you have requested: Skins / Skin Packs / CS: Source FBI CT Skin Pack - 5.97mb is not available. Perhaps try browsing all files for the game Counter-Strike: Source and upload any files you want to share or are missing. This is the only information we could locate:
This is a group of skins I created for the Counter-Terrorist Team on Counter-Strike: Source. They have black armour, and have 'FBI' written on their backs (with the exception of the SAS Model, which has 'FBI' written on the helmet). They are based on FBI/SWAT Teams. They are made on the default Valve models, so only the base game is required.