The Storm Murders by John Farrow. Recently retired Montreal Sergeant-Detective Emile Cinq-Mars is called to a consult on double murder case. Fourth entry in a great series.
I read City of Ice when it came out in 1999 and thought it was great. Ice Lake was also good. I have no idea about River City because there was no darn U.S. release. I've not hunted long to find a used copy, the one I did see was quoted at $2,796.72. That seems a bit high.