Meitantei Conan: Aoki Houseki no Rondo

Onimaru is a TV show superhero that isn't that popular. They decide one day to hop off the TV station escape. At the same time, Toma Katsuragi, the actor playing Onimaru, asks Kogoro to investigate the disappearance of the costume for him, but too late, as he is killed by Onimaru just a while later.

[From Detective Conan World]