Singh is a Sikh, whose turban is the neatest thing about him. He's overweight and he doesn't dress well. Both things upset his superiors on the force, but they can't do anything about him because of his success rate. He's the best investigator on they have. He has to undergo a monthly "you're a disgrace to the force" lecture, but he hardly pays attention.
The current case involves the murder of an expatriate, a lawyer who's one of a group of partners in a high-powered international firm. It seems pretty clear that one of the other partners killed him, but which one? Singh discovers that all of them have secrets to hide, and that the killer might even have been someone outside the firm. Certainly the man's wife and ex-wife have motives. Making things worse is the fact that a relative of Singh's wife is one of the suspect lawyers.
Good local color and entertaining characters, especially Singh and his wife, a couple with a complex and realistic relationship. There's humor, too, and a case that's even more complicated that it first appears. The poignant ending is a bonus. Check it out.