A man walked down Country Club Road in Dedham in what neighbors would describe as “obvious distress” would die following an encounter with local police Wednesday evening as two adults related to him lay suffering from life-threatening stab wounds in a nearby Jackson Pond Road home.

The man in distress, who authorities say has been described by witnesses as the one who stabbed the other two, would die following a chaotic encounter with police in which no gunshots were fired, according to the Norfolk District Attorney. His alleged victims, two non-spousal adult relatives, remained in treatment in Boston hospitals.

“The Office of the Chief Medical Examiner has accepted the case, and an autopsy may be conducted as early as Thursday to establish exact cause of death,” said Norfolk DA Michael Morrissey in a brief statement to the press that night, adding that State Police detectives assigned to his office would “be working through the night with troopers from the Crime Scene Services Section to process the scene for physical evidence.

Dedham Police shortly after 6 p.m. Wednesday received a phone call from the Jackson Pond Road home reporting that a double stabbing was in progress, according to a statement from the DA’s office. As multiple officers responded to the scene, additional calls reported that a man, later identified as Samuel Pattillo, 36, of 2 Jackson Pond Road, was walking along Country Club Road, just a short distance from its intersection with Jackson Pond Road, in “obvious distress.”

Police walked up to Pattillo but he “quickly became combative,” according to the DA statement. The police used a taser and pepper spray and were able to place Pattillo into custody. The DA’s office said that police then “recognized signs of physical distress and began providing life support measures until ambulances arrived” but Pattillo would be pronounced dead at Beth Israel Deaconess Hospital in Needham later that night.

The cause for Pattillo’s death, the DA’s office states, will be determined by the Medical Examiner.