BUFFALO, N.Y. (WIVB) -- A Silver Alert has been 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 cognitive disorder. He is 5-foot-5, 130 pounds [...]