COG Tags 25 - As soon as the mission starts, move into the courtyard and find some short steps leading up on the right. Move around the protruding entrance and find the COG Tags next to a set of steps leading to a blocked door. Click here for an image of the location.
COG Tags 26 - When the cut-scene ends and you're in control again, walk straight forward and note the large columned entrance to your left. Ignore that for a moment and go right to find the COG Tags near a trashed vehicle. Click here for an image of the location.
COG Tags 27 - After gaining entry to the mansion you will need to clear the bottom and top floors before a door is smashed, allowing you access to new areas of the mansion. As you start to go through the new area, you'll engage in a fire fight. Once the smoke clears, find a hallway with a step down, leading to an office. You need to destroy the desk in this room to reveal the COG Tags beneath it. Click here for an image of the location.