What to know about the trial of an ex-Michigan cop charged in the killing of a Black motorist / Would Michigan investigators be able to prove murder in a case without a body? / 'Adults around him failed him': The eerily similar cases of convicted Michigan school gunman and accused Georgia shooter / Trial for Michigan school shooter's mother: Revelations from testimony, evidence in historic case / Death of convicted murderer in Michigan reignites investigation into cold cases / Michigan man implicated in young woman's 1980 murder