A ten-minute patrol

The patrol around the depots should take an hour. Some people did it in ten minutes, because they knew the way very well, and the shortcut. Some clues in this case come as riddles. Four people and one grenade: one person per row, one per column. Whoever is left alone with it in the same room is the one you're looking for.

Suspects

• Aurélio, the tower lookout: He sees everything from up there. That night he mostly saw his phone.
• Bebiana, the goatherd: She grazes her goats along the fence. The goats know more than she does, but they don't talk.
• Clarimundo, the hunter: He walks the scrubland with a shotgun on his shoulder. He says he hunts rabbits. The rabbits won't confirm.
• Dorindo, the patrol soldier: The patrol should take an hour. He does it in ten minutes, because he knows the way.