"I don't see why not, but everyone keep a shape eye out. Set up a perimeter on this location, make sure to look up and down, and someone cover me," Marcus replies. "I'll check this and make sure there are no obvious traps here."
Marcus will approach the man and examine the area and the ropes for a possible trap. If everything is okay, Marcus will want to make sure that the man didn't tie himself here (he could be the blue skinned demon out of armor or whatever). Regardless, Marcus doesn't trust him. But if everything checks out, he will untie the man, watching him intently.