Post #110

-------------✯✯✯----------------- ☞ A famous chemist was murdered in his own lab. There was no evidence except for a piece of paper with the names of chemical substances on it. On the day he was murdered, the chemist had only 3 visitors: his wife, Mary, his nephew Nicolas, and his friend Johnathan. Who is the killer? ------------✯✯✯----------------- @BrainyRiddles