A certified nurse's aide at Park Ridge Living Center in Greece has been charged with mistreating a patient.

52 year old Groven Glenn pleaded not guilty to endangering the welfare of an elderly person, endangering the welfare of an incompetent or physically disabled person and willful violation of health laws.

The accusations stem from his care of an 83-year-old female patient.

A videotape allegedly shows the patient tossing napkins at Glenn. Glenn is accused of throwing a chicken bone at the woman and slamming her wheelchair into a door.

 The woman allegedly had an abrasion in her knee and an ankle injury. Glenn allegedly told police, "I got angry and couldn't control myself."

The incident happened last November. In a statement from Unity Health System, they say that Groven Glenn was a certified nursing assistant there from 2004 until last November.

 The health system says it can't comment on specifics, but says it did take the necessary action to ensure the patient's safety, reported the incident, and fired Glenn.

State Attorney General Eric Schneiderman says his office will continue to aggressively prosecute anyone who abuses seniors in their care.