Old Bones

''You can''t upset anyone looking into old bones.'' DCI Bill Slider''s out of favour in the force - for accusing a senior Met officer of covering up an underage sex ring. As a punishment, he''s given a cold case to keep him busy: some old bones to rake through, found buried in a back garden, from a murder that happened two decades ago, and with most of the principal players already dead. Surely Bill Slider can''t unearth anything new or shocking with these tired old bones?