Polar bear that killed mother and baby son in Alaska was in poor health

The results of her analysis, indicate the bear was an adult male, probably older and in poor physical health.

A walkway leading into the school in Wales, Alaska, where a 24-year-old woman and her one-year-old son were killed (Chrissy Friberg/AP)

A polar bear that killed a young mother and her baby in western Alaska was likely an older animal in poor physical condition.

However, tests came back negative for pathogens that affect the brain and cause aggressive behaviour, officials said.