JAFFREYÂ â The authorities are investigating the suspicious death of a man in Jaffrey Saturday morning, the N.H. Attorney General's office said. Jake Seaburg, 23, died of a stab wound to the chest, and the manner of death was homicide, according to an autopsy conducted Saturday by the N.H. Medical Examiner's Office, the AG's office said in a news release Saturday night. Seaburg was stabbed during an incident at a home on Peterborough Street, the release said. "All relevant parties to the incident have been identified, and there is no evidence to suggest that there is a threat to the general public," the AG's office said.