Archaeologists now know whodunnit — the Hasmonean king Alexander Jannaeus — after uncovering a 2,000-year-old mass burial ground in the municipality’s backyard Evidence of a mass slaying, including cruel beheadings, committed during the bloody reign of the Hasmonean king Alexander Jannaeus (103-76 BCE) was recently uncovered in a courtyard next to the Jerusalem municipality during excavations of an ancient water cistern. “We removed from the pit more than 20 neck vertebrae which were cut by a sword,” said Dr. Yossi Nagar, an anthropologist at the Israel Antiquities Authority (IAA). “We discovered in the pit, bodies and body parts of infants...