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“They killed my son,” Student with autism found dead on school bus

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LOS ANGELES - Officials are investigating after a 19-year-old man was found dead on a school bus Friday night.

"My boy is a very, very precious boy," Eun Ha Lee, Hun Joon Lee's mother, told KTLA. "I don't know other people, how they think about my son, but my son is perfect to me."

Lee says her 19-year-old son, Hun Joon Lee, had autism, was non-verbal and had the mental capacity of a 3-year-old.

She says he was picked up on Friday morning by a bus to attend Sierra Vista Adult School.

When he didn't come home from school, his mother says she became concerned and called the bus company. She then says she called her son's teacher, who didn't answer.

After she was told that Hun didn't go to class that day, she immediately rushed to the school and called police.

A short time later, officers told her that Hun had been found dead on a bus.

"A police officer came to me and then they said, 'We found him. He passed away," she said.

Lee says her son was found in the aisle of the bus.

She says that since Hun was non-verbal, he couldn't have called for help.

Lee says she doesn't know how Hun could have been left behind since there were only three other students on the bus that morning.

"I feel like we are nothing," she said. "They killed my son. Technically, they killed my son."

Police say they don't know how long Hun had been on the bus, but say they are investigating the possibility that he had been left there the entire day.