Szoke v. Minnesota Mining & Manufacturing Co.

finding gratuitous violence where the victim was stabbed twenty-three times and shot in the ear | “[m]ere advice or exhortation by the police that it would be better for the accused to tell the truth, unaccompanied by either a threat or a promise, does not render a subsequent confession involuntary” | improperly admitted lay opinion testimony concerning similarity of bloody footprint and tread pattern of defendant’s tennis shoe was harmless where photograph of footprint and shoe were both admitted into evidence | state has burden of proving confessions voluntary | state has burden of proving confessions voluntary