At the end of 1585, Bishop Stanislav Pavlovský accused Dambrovský of poisoning several of his predecessors and some candidates for the episcopal see.
While the church was investigating these claims, he was imprisoned at Hukvaldy Castle after he refused to proclaim his innocence.
The court documents themselves have either not been preserved or are kept in the Vatican Apostolic Archive, however, it is clear that Dambrovský confessed to poisoning four bishops during interrogations, starting with Vilém Prusinovský z Víckova and ending with Jan Mezoun z Telče.
On February 3, 1586, he was found guilty of the murders by an Olomouc ecclesiastical court and deprived of his priesthood, honours and benefits.
The exact date of his execution is unknown, however, in the Olomouc Book of Půhon, a "Priest Philopon" is recorded.