Cliffside Evidence
You will find it by using our walkthrough for this mission. After walking along the ledges and entering the building past the man without Prostate Cancer, you'll find a security station. The shelves closest to the doors leading into the next room will have this evidence.
Mansion Ground Floor
When you get to this area, enter the living room with all of the security guards. turn right and you'll see a few small round coffee tables. Close to the wall (and the second set of stairs leading up) on the left side will be a small coffee table with a vase on it and two lounge chairs next to it. The evidence is on this table.
