Viktor had taken Matthias in as a disciple and had given the man the chance to assist him with his experiments. This was when Matthias saw it. Deadly nightshade. Atropa belladonna. The vial was in the cabinet and there were no locks to secure it. Matthias felt at that time that he had won the lottery. In the right dose, it was a poison that can put one in a catatonic state. A few hours was all he needed, he just needed them to get his body out of this heavily guarded facility.
While working with Viktor, Matthias had learned that the dead were not burned or buried but instead were simply crudely disposed of at sea.