Man held in S. Boston slaying
26-year-old tied to stabbing case
A 26-year-old South Boston man is expected to be arraigned Monday on murder and home invasion charges in the death of Barbara Coyne, 67, who authorities said was found fatally stabbed inside her South Boston home one week ago. Timothy Kostka was identified as the murder suspect by forensic evidence and information from witnesses, Boston Police said. He was already in custody on an unrelated charge when a warrant was issued for his arrest, officials said.