Kreacher Confesses to Losing the Locket to Mundungus Fletcher

Harry, Ron, and Hermione interrogate Kreacher, who admits to retrieving the locket after it was discarded but later losing it to Mundungus Fletcher, who stole many items from the house. Kreacher, filled with guilt, explains that the locket belonged to Master Regulus and was of great importance. Kreacher's emotional confession reveals Regulus's rebellion against Lord Voldemort.