. ♪ ♪ bill: today could be the last day of testimony in the infamous murder case of jeffery mcdonald the former army doctor. in another bid to prove his innocence after having spent decades behind bars accused of murder. he's accused of killing his entire family. jonathan serrie is on that story. wilmington, north carolina, who will testify today jonathan? >> reporter: well, speaking of that book and movie, joe mcginnis is already here inside the federal courthouse. he is the author who wrote about the jeffery mcdonald case in the 19783 book "faith tal vision" that led to a miniseries the next year. he is expected to be the prosecution's final witness and he says after all these years he hasn't changed his mind about mcdonald's guilt. >> the jury made the correct decision in 1979. it's been upheld by every appellate court that has looked at it in 33 years. i've heard nothing that happened this week that would change anyone's opinion one bit. >> fatal vision has defined this case for much of the american public. author mcginnis points out that that was not the cause of jeffery mcdonal

and through it all one central haunting question -- did jeffery mcdonald really stab and beat to death his pregnant wife and two young daughters in their own home? or as he has maintained for decades that he's innocent and intruders actually killed them? >> i can't prove that i'm not that monster. >> 33 years of he was convicted of the gruesome crime, the case is back in court on monday. as the judge continues new dna evidence and new witness testimony. >> this is extremely significantly. this is a man that received three life sentences. and has been in prison for much of his life and now the possibility is that he could be release zmrd dna evidence wasn't available back in 1979 when he was convicted and his supporters say that genetics from the scene don't match the family. it's a decision that the new book appears to support. >> the case has bothered me for years. >> now, he's now 68 years old. he's not eligible for parole until 2020, the judge in the case could decide within two weeks, whether to order a new trial or exonerate this guy a. >> rob, thank you. >>> an apparently growing

and through it all one central haunting question -- did jeffery mcdonald, a doctor and green beret, really stab and beat to death his pregnant wife and two young daughters in their own home? or as he has maintained for decades that he's innocent and intruders actually killed them? >> i can't prove to the millions of people who have watched the reruns over and over, that i'm not that monster. >> reporter: 33 years after he was convicted of the gruesome crime, the case is back in court on monday, as the judge continues new dna evidence and new witness testimony. >> this is extremely significant. this is a man that received three life sentences. and has been in prison for much of his life and now the possibility is that he could be released. >> reporter: dna evidence wasn't available back in 1979 when he was convicted and his supporters say that genetics from the scene don't match the family. it's a decision that the new book appears to support. >> the case has bothered me for years. the trial in and of itself was a terrible miscarriage of justice. >> now, he's now 68 years old. he's not elig

jeffery mcdonald is back in court with evidence that lawyers says proves the innocence of their client. jonathan serrie has the story. >> reporter: new evidence and previously unreported testimony from the dead. today the brother of admitted drug user helena stokley received that his sister confided in their mother that she was present during the 1970 murders of jeffery mcdonald's wife and daughters and the army doctor was not guilty of the crimes. eugene stokley said just before her death his mother told him she would testify about what she saw but was intimidated about threats of murder charges. but they said they were informing stokley of her rights. stevens says conflicting statements from stokley who is now deceased cannot be trusted, listen. >> her mind is that of a drug addict, even taking -- if you take a lie detector test of what value is it to an insane push with a drug addled mind? it's useless. >> reporter: the public's understanding of mcdonald's conviction was through a book called "fatal vision. the same author that moved in next to sarah palin while writing a book about