BOSTON (CBS) – State Police are trying to find a missing 17-year-old girl from Medfield, who they believe could be in danger. Brittany Thompson was last seen leaving the Medfield Public Library with a man at 4:25 p.m. Monday.

Update Missing Medfield Teen Found Safe In Rhode Island

Investigators say Thompson is developmentally delayed. She is five-feet, six inches tall and weighs 140 pounds.

She has braces on her teeth and was last seen wearing a red sleeveless shirt, blue jeans and flip flops. She typically wears her sunglasses on her head.

The man she was with is white and heavy-set. He had slicked back hair and was wearing a “Sons of Anarchy” T-shirt.

Police say they have received numerous tips since images of the two were released Wednesday afternoon. Based on witness information, police believe the man may have been traveling in a blue or green minivan or small SUV. (Continued…)

Brittany’s father, Michael Thompson, told WBZ-TV he does not know the man in the surveillance photo released by police.

“Brittany, if you’re listening, and able to contact us, please do. We love you, and want you back,” said her father. Thompson said his daughter went to the library after school Monday as part of her daily routine. She stays there until her mother or father pick her up.

Update Missing Medfield Teen Found Safe In Rhode Island

Thompson said the man and her daughter may have met online. Police say Brittany has never had major arguments with her parents and has never run off before.

Brittany is a special needs student and a senior at Tri-County Regional Vocational Technical High School in Franklin. If you believe you have seen Brittany or the man she left with, call State Police immediately at (508) 820-2121 or Medfield Police at (508) 359-2315.

WBZ-TV’s Bill Shields contributed to this report.