When tu see it...

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, o maybe Sharpie.
All of the drawings were the same.
All about The Slender Man.
I looked around. Everything was thrown around frantically.
On the muro infront of us was a drawing of a tower, and it was circled several times, it was drawn in red.
Right siguiente to it, also written in red, were the words:...