James Albert Ryding, 81, was last seen in Niagara Falls, New York, on December 11, 2017. He was observed leaving a building at 9:14 p.m., dressed in a black and yellow North Face winter coat, a black shirt, tan pants, and white sneakers. Known as independent and fond of walks, his failure to return that night prompted immediate concern.

Local and state law enforcement — the New York State Park Police and the Niagara Falls Police Department — conducted searches with help from community volunteers, focusing on parks and wooded areas he frequented. Investigators reviewed nearby business surveillance footage and entered his information into national missing persons databases, but searches and appeals produced no significant leads.

Does anyone who lived in Niagara Falls in 2017 recall seeing Mr. Ryding or sharing knowledge that might help his family find answers?