Churchgoers filing out of the nine o'clock Mass at Blessed Mother Teresa church on Monday morning discovered the dead body of a man on the grounds of the church.
The Medical Examiner's office on Thursday said that the victim, 43 year-old Richard Lanoue of South Boston, died of accidental hypothermia.
Captain Paul Russell, commander at the South Boston-based Area C-6 police district, said that Lanoue was pronounced dead shortly after police arrived at the scene at about 9:45 a.m.
"He was sitting next to the church, right along the path that runs along Dorchester Ave.," Russell said. "We don't believe foul play was involved at this time."