Because the blood we had found in other areas of the house clearly had been tracked and transferred by Waddell, it was realistic to say that his assault of Robyn Naismith was restricted to the living room, where she died. The kitchen and front doors were equipped with deadbolt locks that could not be opened without a key. Since Waddell had entered the house through a window and left through the kitchen door, it had been surmised that when Robyn returned from the store, she had come in through the kitchen. Perhaps she had not bothered to relock the door, but more likely she had not had time. It had been conjectured that while Waddell was ransacking her belongings, he heard her drive up and park behind the house. He went into the kitchen and got a steak knife from the stainless steel set hanging on a wall. When she unlocked the door, he was waiting. Chances are, he simply grabbed her first and forced her through the open doorway that led into the living room. He may have talked to her for a while. He may have demanded money. He may have been with her only moments before the confrontation became physical.

Robyn had been dressed and sitting or supine on the end of the couch near the ficus tree when Waddell struck the first blow with the knife. The blood spatters that had appeared on the backrest of the couch, the planter, and the dark paneling nearby were consistent with an arterial spurt, caused when an artery is severed. The resulting spatter pattern is reminiscent of an electrocardiogram tracing due to fluctuations of arterial blood pressure, and one has no blood pressure unless he or she is alive.

So we knew that Robyn was alive and on the couch when she was first assaulted. But it was unlikely she was still breathing when Waddell removed her clothing, which upon later examination revealed a single three-quarters- of-an- inch cut in the front of the bloodstained blouse where the knife had been plunged into her chest and moved back and forth to completely transect her aorta. Since she was stabbed many more times than that, and bitten, it was safe to conclude that most of Waddell’s frenzied, piqueristic attack on her had occurred postmortem.