The death of a nearly blind refugee from Myanmar who was found on a Buffalo, N.Y., street in February — five days after U.S. Border Patrol agents left him outside a Tim Hortons — has been ruled a homicide.

The Erie County Medical Examiner’s Office didn’t reach any conclusions about responsibility for Nurul Amin Shah Alam’s death, which the agency said Wednesday was caused by complications of a perforated duodenal ulcer, precipitated by hypothermia and dehydration. Ruling a death a homicide means it resulted from another person’s actions — or inaction — but doesn’t necessarily mean that a crime was committed.

“This should not have happened,” Erie County Executive Mark Poloncarz said at a news conference Wednesday.

Asked whether the Border Patrol was responsible for his death, he declined to comment and said any such determination would be up to law enforcement agencies.