Watching the dark

"When Detective Inspector Bill Reid is found murdered in the tranquil grounds of the St Peter's Police Treatment Centre, and compromising photographs are discovered in his room, DCI Banks is called in to investigate. Because of the possibility of police corruption, he is assigned an officer from Professional Standards, Inspector Joanna Passero, to work closely with him, and he soon finds himself and his methods under scrutiny. It emerges that Reid's murder may be linked to the disappearance of an English girl called Rachel Hewitt, in Tallinn, Estonia, six years earlier. The deeper Banks looks…