After the football match, Kante Costa Luiz Michy and Moses went for a sauna where they can't see each other.
Suddenly Kante noticed blood in his hand and he shouted and the steam was switched off and they noticed Michy was dead.
Detective Edgar was called and all the suspects about the things they bring with them to the sauna.
Kante: A beer in a plastic Mug.
Costa: Just a Thermos
Luiz: A Sherlock Holmes book.
Moses: A Rope
Detective Edgar instantly arrested the killer. Who is the killer?
Answer there --->
this is not an answer
Costa brings the dagger made of ice in the thermos so it won't melt. He killed the Michy with the dagger and then the dagger melts with time.