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German authorities launched a probe into a string of deaths at a metal fittings company after an employee was caught trying to poison a co-worker's lunch. Police found quicksilver, lead and cadmium in the man's home.
The man was arrested for the incident in the town of Schloß Holte-Stukenbrock, northwest Germany. However, police now suspect he may be responsible for up to 21 deaths of people working for the same company.
The police detained the 56-year-old suspect in May this year, after one of his co-workers noticed an unknown white powder on his food. The would-be victim alerted his superiors and asked them to review the recordings made by security cameras, which then showed the suspect adding the substance to the co-worker's lunch.