of the surgical gloves. He had then used the family telephone to summon an ambulance before lying down beside Colette's body as he waited for the military police to arrive. Interrogation On April 6, 1970, Army investigators formally cautioned, then interrogated MacDonald. He was first offered the chance to recount his version of events, and recounted his claims of being attacked by four intruders, with whom he grappled before falling to the ground, observing "the top of some boots" and being rendered unconscious before regaining consciousness, experiencing symptoms of pneumothorax, in the hallway after the intruders had left. Investigators were unconvinced of MacDonald's accounts. Midway through questioning, MacDonald was asked the question about his stab wounds by CID Investigator William Ivory: "You didn't do it yourself, did you?" This question prompted MacDonald to deny the accusation before referencing his puncture wound and his having to persuade hospital doctors to insert a chest tube into his body as he was sure his lung was punctured. Questioning then focused upon the crime scene and results of the forensic testing. MacDonald denied any of the murder weapons had originated from his household, despite the fact the section of lumber matched wood from Kimberley's closet. He also claimed to be unaware of how the fiber and blood evidence contradicted his accounts of his movements and actions. Investigator Robert Shaw then questioned MacDonald as to the lack of disorder and damage within the household, and the lack of any motive, stating that in the investigators' experience, had four intruders embarked on a murderous frenzy within a small household, they would expect to encounter evidence such as "busted furniture and broken mirrors and bashed-in walls", but the only signs of the struggle were the top-heavy living room coffee table, which had not flipped over all the way in the midst of his struggle, and a flower pot beside the table with the plant upon the carpet and the pot standing upright. MacDonald was unable to offer a plausible explanation for this observation, and also claimed to be unaware how Kimberley's blood and brain serum were recovered from the master bedroom. Following a short break, questioning resumed the same afternoon. Investigator Franz Grebner listed further physical discrepancies between MacDonald's account and the forensic evidence, repeatedly stating all the facts pointed to his having staged the crime scene. MacDonald was unable to offer a plausible explanation to this