Don't Freak Out

Alex checked to see that the coast was clear before Sarah and Michael dragged the body out to his car, making sure not to get any blood on the seats. He then poured the gasoline all over the warehouse and lit one of the matches Three kept with some other supplies in a corner. 

You couldn't even see it burning from the outside as they drove to the dumping point. Sarah tied his legs together before tying the rope to a rather large rock she found lying nearby. Michael and Alex then threw him and the rock over the edge. 

There were no cameras and no witnesses; they had been sure to check before they even got out of the car. The Agency used to use this rather secluded spot to get rid of bodies for a reason. None of them had ever been found.