ROOSEVELT, NY (WCBS 880) – Authorities are investigating a disturbing incident involving a blind 50-year-old wheelchair-bound patient and an employee at the United Cerebral Palsy Center in Roosevelt.

WCBS 880’s Sophia Hall On Long Island

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Gregory Richardson, 21, lowered the back of the wheelchair the patient was in and started bouncing it around, saying it was “like a roller coaster ride,” Nassau County police Lt. Kevin Smith said.

“The victim appeared to bite himself, maybe in a frantic manner,” said Smith. “We have a man who is 50 years of age who has a mental and physical disabilities virtually his whole life.”

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Smith said the attendant made the patient fear for his safety.

Richardson has been charged with endangering the welfare of an incompetent person.

“[It’s] a law that was put in effect so that people who can’t defend themselves, action can be taken against people who abuse them,” Smith told WCBS 880 reporter Sophia Hall.

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Police said Richardson had taunted the victim in the same way at least one other time.