Detective Kyosuke Kozus Murder Reasoning 5

Newspaper reporter Kenzo let a strange woman Emi took taxi while on the way home from a business trip Later when he stopped by his girlfriend Nobukos house to give her souvenir he noticed that the suitcase had been replaced by Emis A knife with blood wiped out came out of Emis trunk Nobukos older brother Kyosuke is a university professor but he is also a famous detective The next day Kyosuke made Kenzo follow Emis elder sister Yuri who came to exchange the trunk Emi and Yuri are daughters of the landowner Kayama family but they were both children of their exwife His second wife Shizue has Miyako another kid Emi had a bad time with Shizue and left home and she had just returned for the first time in three years