Hashirama recently sent his younger brother Tobirama on a mission, but what he didn't expect was for Tobirama to return with someone tied up and wearing a different village's anbu mask little did they know it was their younger sibling who they thought was dead after seeing his body. Hashirama looked at Tobirama with a questioning gaze

Hashirama:"Tobirama, why did you bring an anbu from a different village?"

Tobirama:" Simple because I caught him trying to steal our information"