The man died four years after eating the poisoned sandwich, which he slipped into a coma.
German media reported that the 26-year-old employee, whose name was not mentioned, ate a sandwich with a combination of mercury and acetate of lead. As a result, he suffered serious brain damage. Two of his colleagues also was diagnosed with kidney disease.
The alleged offender, identified only as Klaus O., was convicted of attempted murder last year and sentenced to life imprisonment.
The Prosecutor stated that the Supreme court may appoint a new trial now that the victim died, according to Bild.
The investigation began in 2018, once the colleague of the company for the production of metal in the city of Schloss Holte-Stukenbrock, to the North-West of Germany, noticed a strange white powder on your lunch.
Later at the working place was equipped with surveillance cameras, which recorded as Klaus is About adding poison in the sandwiches of their colleagues.
Tests have shown that it is a mixture of lead acetate and mercury, almost tasteless substances, which, when ingested, can cause serious damage to organs.
Further searches confirmed that Klaus ‘ house About were mercury, lead and cadmium. According to the psychologist, he called himself a «researcher, who is trying to understand how different substances affect rabbits.»
After the trial in March 2019, the judge ruled that the accused will not be able to request a reduced prison sentence because he is «a danger to the public».
