By this time speculation as to what was causing the Bovingdon bug had understandably reached fever pitch. Winifred Young writes that Diana Smart even confided in the firms Managing Director, Godfrey Foster, that she suspected Graham Young was a germ carrier. Alas, the only suggestion she could make as to how he might have caught such germs was that he lived in a boarding house with a Pakistani family.
On the afternoon that Fred Biggs death was announced, the firms doctor gathered the staff to a meeting to reassure them that there was no evidence that any lack of hygiene on the company premises could have caused the deaths and illnesses. Yet one man wanted to know more. The doctor was surprised to find himself being grilled by the young store assistant, who asked several detailed questions as to why poisoning by the heavy metal thallium had been ruled out. The doctor was puzzled by his apparent in-depth knowledge of the subject, and told the firms owner. He in turn informed the police.
Its perhaps not so surprising that doctors took a while to consider thallium poisoning as a cause of the outbreak, because until Graham Young used it, it had never been used as a poison in
Graham Young may not have been a sadist in the conventional sense, but he did take great pleasure in following and noting down every last gruesome symptom each of his victims suffered, recording them each day in exercise books and plotting graphs to analyze their progress.
This almost fetishistic documentation proved his downfall. Once the firms MD had alerted police, it didnt take detectives long to work out that the illnesses had started shortly after a certain individual had joined the Bovingdon firm. A quick consultation from a couple of forensic scientists revealed the symptoms of the victims were consistent with thallium poisoning. They were also kind enough to finally inform the firms bosses that Graham Young was a convicted poisoner.
Police immediately searched Graham Youngs room in nearby Hemel Hempstead, where they were confronted with walls covered in pictures of Hitler and other Nazi leaders, accompanied by drawings of emaciated figures holding bottles marked poison, clutching their throats as their hair fell out. They also found bottles, phials and tubes lined along the window sill, and under his bed lay the incriminating diary, with a number of entries following the progress of his patients.
The day was Saturday, November 21, 1971, and Young was visiting his father Fred and Aunt Winnie in Sheerness,



