Kevin watched as Tyler went into one room, while Kelsey went into another. Meanwhile, the girl who had ran into him was just sitting on the desk, looking rather worried and confused.
He grabbed his knife from his back pack, and gripped it tightly.
"Hey guys, I'm going to check upstairs." He said while slowly climbing the set of stairs.
At the top of the stairs, he came to a door.
He pressed his ear to the door, checking for any signs of movement behind it.
After being convinced that no one was moving around behind the door, he slowly pushed it open, knife at the ready.