Perth flat.Smullen, 23, claimed the fatal injury was inflicted when Barry pulled a knife on him and they both ”tripped and fell” during a struggle over the weapon.But a jury at the High Court in Edinburgh rejected his defence of self-defence and returned a majority verdict of culpable homicide.Sentencing Smullen on Friday, judge Lady Carmichael said the killer had been “disinhibited by alcohol and the effects of sexual jealously”.The judge added that no sentence imposed could “repair or lessen