Suffolk County Police are asking for help in locating a missing 21-year-old autistic man from Wyandanch.

Police issued a Silver Alert for Thomas Griswold, who they said left his home on South 22nd Street on Friday at about 7 p.m. and has not been seen since.

Griswold is 5 feet, 10 inches tall and weighs 200 pounds. He has brown eyes and short black hair. Griswold was last seen wearing a blue hooded sweatshirt, blue jeans and glasses.

Anyone with information on his location is asked to contact the Fugitive/Missing Persons Section at 631-852-6634.

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