dr. vincent di maio said it isn't reliable to use tests on the stomach to fit the time of death.illiamson county man took the stand today in his own murder trial. 32-year-old michael morton is charged in the death of his 31-year-old wife chris. morton broke down in tears today as district attorney ken anderson showed him photos of his wife's body. >> ken anderson's theory of the case was the theory that it was michael's birthday. christine had refused to have sex with him that night. and he went into a homicidal rage and killed her. >> prosecutors say he beat his wife to death after she refused to have sex with him on his birthday. >> the headline reveals the argument of the prosecution. district attorney ken anderson today focused his line of questioning on morton's infrequent sexual relationship with his wife. >> under ken's theory at that point, then michael masturbated over christine's body as, i guess, some form of sexual release. we don't know what it was. but when he did that, he had tears coming down his eyes as he talked to the jury. it was really quite an effective perf