The search for a missing Main Line teen stretched into day four as community members combed the boy's Newtown Square neighborhood to start the weekend.
Cayman Naib left home Wednesday night after getting a notice from school about an overdue assignment.
The 13-year-old has been under pressure recently to get his school work done, according to his mom, who said Cayman may have feared having to admit he was behind and face the consequences both at home and The Shipley School.
Breaking news and the stories that matter to your neighborhood.
"We think his leaving might have been sparked by an email that said he was going to fail a class if he didn't get something in by today," said his mother, Becky Naib. She was the last to see Cayman, who was doing homework before dinner Wednesday night. When the family sat down to eat around 7:15, Cayman was gone.
"We were trying to rule out that he got hit by a car and was on the side of the road or something. We had a massive search today," Naib said. About 200 people combed the teen's Newtown Square neighborhood in Delaware County.
The family set up a Find Cayman Facebook page to heighten awareness of the search for their son, who left in black ski pants, hiking boots and a gray down jacket. He is 5'7" and weighs 110 pounds. He left without his phone and has not been accessing his email or social media accounts.
Becky Naib said Cayman has a tight group of friends who have all been interviewed by police and the school. They don't believe he's hiding out with anyone from school.
"The kids and the school have been incredibly supportive," she said.
With temperatures in the single digits overnight, Cayman's mother said she thinks he'd seek shelter.
"I think unless he's hurt somewhere, I think he found a safe place to stay."
Newtown Township Police suspect Cayman ran away and say they have no reason to believe otherwise.
Still, the Philadelphia division of the FBI joined the search on Friday. A bureau official tells NBC10 the they are providing forensic investigation support as they often do with cases of missing juveniles.
Anyone with information on Cayman is asked to call police at 610-356-0602.