The Pennsylvania man who allegedly killed his ex-wife and five of her relatives last week died of a drug overdose, according to the Montgomery County medical examiner. Authorities said in a statement Tuesday that 35-year-old Bradley Stone died from a “combined drug intoxication” of drugs used to treat people suffering from post-traumatic stress disorder. The Iraq War veteran’s body was found in a wooded area about a half a mile from his home on Dec. 16. Police said a machete and an axe that “appeared to be coated in blood” were found near his body, along with two medicine bottles, one of which contained crushed-up powder, as well as an energy-drink container with powder residue. Stone allegedly killed his ex-wife, Nicole Hill, and five of her family members in Montgomery County the day before his body was found.