C1857 Childhood Friend Suspect

There was only one key to open the door to the roof, and the only key had always been in Gino's hand.

Only on the tenth of every month would a cleaner come to the rooftop to clean. Gino would open and close the door himself, and the key never left his hand.

Now that a corpse had suddenly appeared on the rooftop, it was not wrong to say that he was the most suspicious person