Though this was easier said than done, he was the most informed me in the world, possibly even more than me, so if I had to take a guess, it was most likely he already knew of my true intentions, if so I had to play safe or I would wake up dead, I had to throw him off his game.
couldn't he check for bodies in the house so that he can confirm that they are dead or not?
Mark did not plan on going to that house as he knew that Carren did not live here anymore after she married. The current inhabitants of the house should be her parents. Since they were there already, they passed by the house but Mark detected no one inside the house. With that, they continued on their way.