Barty stared at Regulus' out-held hand. He was believed? He was being given a chance?
"I understand if it will take you a while to fully trust me," Barty said, raising his own hand to clasp Regulus'. "But I will do everything I can to prove myself. Thank you for this chance."
They were shaking hands when somebody came into the shop from the back, the person Regulus had mentioned before. Barty was wondering whether the good looking man was another employee, or a friend of Regulus', when he realised that he knew this man. He struggled to keep his expression calm as he recognised the man Bella had tortured in the Shrieking Shack, the Animagus Barty had let escape, whose suffering had shaken Barty enough to start changing his mind about Bella.