Library Murder Case

The case goes on, and Heiji declares that he has solved it! After explaining his theory, the police are satisfied. Before they can do anything, a man appears saying that his theory is 100% impossible! That man is Shin'ichi!! The case continues and Shin'ichi explains his theory. His being true, the police arrest the right criminal. Though as he's talking to Ran, he body feels on fire again. Is Shin'ichi going back into Conan mode?