State police are asking for the public's help to find a missing Medfield teen who may be in danger after she was seen leaving a local library with a man.
Police issued an advisory on Wednesday in an effort to help locate 17-year-old Brittany Thompson.
"We have reason to believe Brittany Thompson is endangered," police said in an advisory.
Thompson was last seen about 4:30 p.m. Monday at the Medfield Public Library. She was with a white, heavyset man who is described as having slicked back hair and wearing a "Sons of Anarchy" T-shirt.
Police said Thompson is developmentally disabled. They described her as 5 feet, 6 inches tall and 140 pounds. She was wearing a red sleeveless shirt, jeans and sandals.
Anyone with information can call 508-820-2121.
Follow Michael Naughton on Twitter @metrobosmike.