Video appears to show the athlete having a kick-about in prison yard . Enjoys penalty shoot-out with notorious Czech 'gangster ' Radovan Krejcir . Pictures appear to support claims sprinter has dramatically slimmed down . The man who was jailed for life after being found guilty of murdering his wife and two children will be released from jail on Friday - just days before he is due to stand trial again.
Video appears to show the athlete having a kick-about in prison yard . Enjoys penalty shoot-out with notorious Czech 'gangster ' Radovan Krejcir . Pictures appear to support claims sprinter has dramatically slimmed down . He struck up friendship with Krejcir after sharing gym on hospital wing .