i need help getting past the the second checkpoint....i go under the porch..up the stairs but i can't see where i go to the next level...how do i get past this

My response in the other thread made a wrong assumption of where you were.

There is a fence near you with a very narrow gap. Get close to it and you will use a 'back to the wall' move to squeeze through to your next area.

Thats it. And when you're to the end you'll have to SWAT turn yourself out.