To successfully prosecute Party Pete, follow these steps before entering the courtroom: * Read through the two case reports. * Interview Ikis Krum, located in the courthouse. Go through all the chat options. * Interview Party Pete, located in the courthouse. Go through all the chat options. * Use the viewing orb to get to the crime scene (the Party Room). * Use the Bat-in-a-box (inside the party room, next to the Magical Amplifier). * Use the magnifying glass on the magical amplifier (gramophone). * Match the fingerprint with Ikis Krum. * Leave the crime scene.