WICHITA, Kan. (KWCH) – Wichita police are asking for help finding Christopher David Ryan, who was last seen at the bus station at 214 S. Topeka. Ryan is a 56-year-old white man with dementia, 5-foot-10 with a slender build, gray/brown hair and blue eyes. He was last seen wearing a dark gray t-shirt, shorts and light gray shoes. His left leg is bent outward at the knee.