BUFFALO, N.Y. (WIVB) -- A Silver Alert was canceled after being issued for a missing Tonawanda man, according to the Erie County Sheriff’s Office. Melvin Williams, 77, was last seen at Safire Rehab on Sheridan Drive in Tonawanda. He is said to be suffering from Alzheimer's disease or a related cog nitive disorder. He is 5-foot-5, [...] ...read more read less