Tell him he's in no position to ask questions and then demand he tell you what he was doing here.

"You're in no position to ask questions which is surprising you're trying to do so with both of your legs pulverized. What are you doing here."
He hesitated. Then spoke quietly.

"We usually get contracted to eliminate most Mutant nests. Namely towns that are filled with the things. The City usually contracts the killings. Mutants populate like rats and people don't like em'."