At the Treblinka extermination and forced labor camp only a few SS soldiers and around a hundred watchmen kept guard over thousands of prisoners. Despite their lower rank in the Nazi hierarchy than SS soldiers, watchmen were vital to implementing “Operation Reinhard” in the field. Prisoners in Nazi camps were terrified by their brutality and ruthlessness.The guards were intermediaries between the camp’s inmates and the commanding crew, so in cases of a prisoners’ riot, they were the first target. The historical records mention several incidents where the watchmen died at the hands of the captives. However, little is known regarding how the dead bodies of the guards were treated nor what the funeral customs looked like in the camps.In 2019, a row of individual burials was discovered at the former Treblinka extermination and forced labor camp. Seven of those graves were explored to identify the people buried in such an unusual manner and to find out what had caused their deaths. A thorough multidisciplinary study, combining the forensic disciplines of archaeology, anthropology, medicine, and genetics provided the answer.Considering archaeological findings, it can be deduced that the graves belong to the Treblinka guards. The analysis conducted by an anthropologist indicates that the assessed biological profile aligns with the antemortem data of the Treblinka watchmen. Moreover, a study examining perimortem trauma has unveiled that out of the seven men studied, at least two met a violent demise. These findings are crucial in narrowing down the identification process.The results of our study contribute to a general understanding of the funerary customs prevalent in concentration camps worldwide. Prior to this work, there had never been any analysis or publication of the characteristics of watchmen graves at Nazi camps, making our results unique.