David MacDonald 's wife and two daughters were murdered in Afghanistan . A military inquiry recommended he not be tried for the murders , citing a lack of evidence . James Blackburn , the prosecutor who MacDonald said threatened Stoeckley , would not comment on the charge because of pending litigation . He was later tried and convicted in criminal court and is serving a life sentence . Today , a new book by filmmaker Errol Morris seeks to prove MacDonald 's innocence .
David MacDonald 's wife and two daughters were murdered in Afghanistan . A military inquiry recommended he not be tried for the murders , citing a lack of evidence . He was later tried and convicted in criminal court and is serving a life sentence . Today , a new book by filmmaker Errol Morris seeks to prove MacDonald 's innocence .