[Shane stares at him for a long time. You sound like Rick. So his answer is snappish and...by the book.]

Suspects do not demonstrate any sense of intelligence, awareness of the environment beyond instant need. Suspects do not respond to verbal threats or demands, Suspects do not indicate a preference for authority, a memory of race, creed, nationality or basic human societal rules. Suspects devour human flesh and tend toward herd animal instincts.

There's no way to keep them in the ground.