Madame Macabre sees two directions with corpses. The first seems to be in the direction Zyzzak indicated where the people are running. The other area is off to the side but in that general direction. There seem to be more corpses in the second direction.
Bulwark knows that one thing the teleporter can't teleport is itself. So they either have to physically take it with them or completely destroy it. More than a few Shadow bases were found and eliminated through examining the partially destroyed remains of a teleporter.
Since your Penetrates Concealment only applies to Corpses, you aren't going to get more details than that.