A Very Polite Murder by William Foster

With no sign of a break-in, nothing taken and no sexual motive, it has to be a domestic murder. Or so DI Keen believes. Eight years after Simon Browning is convicted of murdering his wife, the real killer shows himself. It's down to Simon's best friend, Tommy, to get DI Keen to re-look at the case. There is a plan in place and it is heading to conclusion. Set in the Welsh borders, the killer uses the forests along the river to find ways of disappearing. See on Amazon.