Lets Find Slender!

I slowly put the key into the lock, it went in, and I slowly turned it until I heard a click! and I opened the door slowly, a loud creeeek! following.
Light poured into the room from the window, and we all steeped inside.
We were breathless.
All over the walls, was papers coverd in black crayon, marker, or maybe Sharpie.
All of the drawings were the same.
All about The Slender Man.
I looked around. Everything was thrown around frantically.
On the mural infront of us was a drawing of a tower, and it was circled several times, it was drawn in red.
Right seguinte to it, also written in red, were the words:...