to reconstruct a likely scenario of the chain of events that had unfolded via blood typing and the nature and severity of the wounds discovered upon each individual. Forensic reconstruction An argument or fight between MacDonald and Colette began in the master bedroom, possibly over the issue of Kristen's repeatedly wetting his side of the bed while sleeping there, or his adultery. Investigators speculated that the argument turned physical and she had probably hit him on the forehead with a hairbrush, which resulted in a mark on his forehead which failed to break his skin. As he retaliated by hitting her, first with his fists and then beating her with a piece of lumber, Kimberley, whose blood and brain serum were found in the doorway, may have walked in after hearing the commotion and was struck at least once on the head, possibly by accident. Believing Colette dead, MacDonald carried the mortally wounded Kimberley back to her bedroom. After stabbing her, MacDonald then proceeded to Kristen's room, carrying the club he had used to bludgeon Kimberley, intent on disposing of the last remaining potential witness. Before he could do so, Colette, whose blood was found on Kristen's bed covers and on one wall of her room, apparently regained consciousness, stumbled into her younger daughter's bedroom and threw her own body over Kristen in a desperate effort to protect her. After killing both of them, MacDonald then wrapped Colette's body in a sheet and carried her body to the master bedroom, leaving a smudged footprint matching her blood type as he exited Kristen's bedroom. CID investigators then theorized that MacDonald attempted to cover up the murders, using articles on the Manson Family murders that he had recently read in the March 1970 issue of Esquire investigators had found in the living room. Putting on surgical gloves from a medical supply in the kitchen closet, he went to the master bedroom, where he used Colette's blood to write the word "PIG" on the headboard. MacDonald then laid his torn pajama top over her dead body and repeatedly stabbed her in the chest with an ice pick, then discarded the weapons close to the back door of the property after wiping them clean of fingerprints. Finally, MacDonald took a scalpel blade from the supply closet, entered the adjacent bathroom, and stabbed himself once in the chest while standing beside the sink before disposing