Police have arrested a bus matron after a special needs student was left overnight on a Brooklyn bus in sub-freezing temperatures Wednesday.

Linda Hockaday, 51, was arrested Thursday night and now faces charges of reckless endangerment.

Investigators found Edwin Rivera cold and shivering at a Brooklyn bus yard Thursday morning, nearly 24 hours after he left home.

The 22-year-old, who has cerebral palsy, is being treated for hypothermia at Brookdale University Medical Center.

Rivera's family reported him missing around 9:30 p.m. on New Year's Eve when he didn't return to his East Harlem home after taking part in a special needs program.

They are still trying to figure out how this could have happened.

"How could they do that, how could they lose a person?" said Khristine Rivera, the student's brother. "He's like 6'2 and hunches over, the seats are not even high."

"I hope something, something's got to happen," she continued. "Because that's just pure negligence and stupidity and just because he is the way he is doesn't mean he's less of a person, he just needs extra help."

Edwin Rivera is said to be in stable condition.

NY1 has reached out to Outstanding Transport, which owns the the bus, but has not received a response.