A Death in Tokyo by Keigo Higashino
A Death in Tokyo is the third entry in the Detective Kaga series that has been translated into English. Once again, it's a solid, enjoyable read, with a couple of good twists. Kaga is part of a squad investigating the brutal murder of a middle-aged man. The man was stabbed but stayed alive long enough to drag himself to the famous Nihonbashi Bridge, in order to die at the foot of the statue of a kirin adorning it. Not far away, a young man in a park flees police and runs out into traffic where he is struck and seriously injured. The young man, Yashima, is carrying the murdered man's wallet. Unfortunately, the man ends up in the hospital in a coma, unable to answer questions.
This is a police procedural. Kaga is unsatisfied with Yashima as the killer, so he keeps questioning people and walking the neighborhood where the crime occurred. He's persistent, follows his hunches, and step by step...