CARLE PLACE, NY (CBSNewYork) – The grandfather of 6-year-old Sean Feldt was nearly brought to tears as he told of how his grandson, the love of his life, was left strapped in a car seat in the back of a mini school bus, by himself, for at least 15 minutes in the bus depot.

WCBS 880’s Sophia Hall On The Story

Sean is not only young, but he is also autistic.

“Pure terror, pure terror. Indescribable,” said David Feldt.

“How is he doing?” asked WCBS 880 reporter Sophia Hall.

“He’s doing fine. It doesn’t seem to have affected him much. I understand he slept through it call,” said David.

He said he would eventually allow Sean back on the bus, but the shock has to wear off first.

Sean’s mother Crystal began to shake as she said how scared she was when she got the call from the school.

“My heart jumped out of my chest,” she said. “I was like in too much shock to cry at that point.”

She says a guardian angel must have been watching over her son to make sure he was alright.

1010 WINS’ Carol D’Auria reports

The Carle Place school district’s superintendent said he is very thankful Sean is okay and he is doing a full investigation.

The bus company, Pierce Coach Lines in Roslyn, did not return call for comment.