A cry of shadows

Mystery novel, sixth in the Jack Dwyer series.

Jack Dwyer is hired to deal with "some problems" caused by residents of a homeless shelter located near a chic, downtown restaurant. Before Dwyer can even act on his orders from one restaurant owner, he is fired by a second. Then, several days later, the first owner, a man named Coburn, is murdered, and his gorgeous, none-too-grieving widow re-hires Dwyer to locate the killer.