psychiatry who had also testified at the Article 32 hearing, Bruce Bailey, testified. Bailey stated that, when discussing his family and the events surrounding their deaths with him, MacDonald would occasionally "become emotional, become tearful, but he recovered quickly". Bailey also testified he found MacDonald to be a controlling individual who was "extremely dependent on what others thought of him" and that he would often launch into a verbal "tirade" to allow his deep-seated emotions to become expressed by other means. When questioned as to whether MacDonald suffered from a mental disorder, Bailey testified he did not, although he could not discount the possibility of him murdering members of his family in a situation of extreme stress. This testimony was followed by a Philadelphia-based psychologist who conceded that, had MacDonald committed such an act of violence, he would successfully "completely block" the episode from his mind. The chief of the FBI's crime laboratory chemistry section, Paul Stombaugh, then testified the pajama top placed over Colette's body had been heavily bloodstained before the garment was torn, and that—contrary to MacDonald's claims—a lack of tearing at the edges of these holes proved that all 48 holes within this item of clothing had been inflicted while the garment was stationary, rather than in motion. Stombaugh also testified all the cuts within all garments other than the pajama top had been inflicted with the Old Hickory kitchen knife found outside the family home and not the paring knife he claimed to have removed from Colette's body, that the majority of this blood had belonged to Colette, and her blood had transferred onto the garment on at least four locations prior the garment being torn. Furthermore, the club used to bludgeon Colette and Kimberley, which MacDonald had denied any knowledge of, had also been sawed from one of the mattress slats in Kimberley's bedroom, and a single hair found in Colette's right palm had sourced from her own body and not a blonde-haired intruder. Further testimony MacDonald was recalled to testify before the grand jury on January 21, 1975. On this occasion, he was markedly arrogant and sarcastic when questioned with regards to issues such as his infidelity or the prosecution's illustration of forensic contradictions between his version of events and the physical evidence, on one occasion shouting: "I have no idea! I don't even know what crap you're trying to feed me!" in response