Yes, at the onset there was problems with the evidence gathering and crime scene. It was 1970 and it was on a military base. However the prosecution was meticulous and amazing. MacDonald has lost every appeal he's filed, including to the Supreme Court. The current one is without merit; claims of unidentified hairs and a Marshal's claim. The hairs were not removed forcibly and ALL houses have stray hairs in them. Marshal Britt has already been proven, with documentation, to be a liar. He claimed a witness, Helena Stoekley told him, while being transported, that she was threatened by the D.A. with prosecution if she said she was at the MacDonald house the night of the murders. Problem is, Marshal Britt was never involved in her transport.
At one time MacDonald and his attorneys swore that DNA evidence would clear him and prove who did it. When the results finally came back it proved who the murderer was; MacDonald!