Looking for a "Case Closed" episode!

The episode where the murderer tried to kill herself দ্বারা burning the building but there is no gas so she just breaks down saying she wants to die and যোগদান the man she loves. can't remember which episode it was and Case closed has so many episodes. All I know is it must be in seasons 1-5 since I watched it in English dub. thanks for any help :)