Originally Posted by QuasidodoJr
I've double-checked Fizz, and on Miss Merciless on Chapter 8, you must alert the SS Officer in the last area and be spotted out in the open by him. That's the only way he blows his whistle, and the only way the final 2 guards will spawn into the area. Just firing off a rifle shot or whistling will not get the job done. I reiterate, he must clearly spot you and blow his whistle.
I also double checked this you need to grab their attention, i have no altered that info. I did get their attention though firing a rifle at one of the guards but they spotted me so that's why i had whistle for a short while.
Just as long as they start hunting for you it's fine, just dart back under the wall and hide it out for a few mins