The Maine medical examiner’s office has identified skeletal remains found in Portland, but the cause of death has yet to be determined. Officials said Monday that the remains were those of 31-year-old Toina Hanson, and they’re seeking to talk to anyone who had contact with her over the past year. The case remains under investigation. The remains were discovered by a man picking blueberries near Hutchins Drive. Hanson was identified through items discovered at the scene along with the review of the woman’s medical records.