Sunao Tom Yamada, 54, was found dead on Temple Street across from One City Center in Portland, Maine, in the early morning of September 10, 2017. The state medical examiner ruled his death a homicide; authorities did not publicly disclose a specific cause. Yamada had lived in Portland about two decades and was experiencing homelessness, a familiar presence around Monument Square.

He was last seen alive about 3:20 a.m., and a 911 caller discovered his body at 4:20 a.m. A witness reported seeing him with another man near where he was found. Portland police identified that man as a person of interest: described as a white male about 25 to 30 years old, roughly six feet tall, thin build, dark hair, and later circulated a police sketch. No arrests have been announced and the person of interest has not been publicly identified.

Anyone who knew Yamada, saw him the morning of September 10, 2017, or recognizes the sketch is asked to come forward with information.