BALTIMORE (AP) - An autopsy has found that a former Johns Hopkins gynecologist who was suspected of secretly recording exams committed suicide by putting a plastic bag around his head and attaching it to a tank of helium.

Dr. Nikita Levy killed himself as he was under investigation for allegedly taking secret pictures and videos of his patients.

WBAL-AM reports that the Maryland medical examiner's office ruled that asphyxiation was the cause of death. Police have also confirmed that Levy left a suicide note addressed to his family.

Meanwhile, attorney Jonathan Schochor says he plans to sue the hospital over Levy's behavior. Schochor's law firm won a more than $120 million case against Delaware pediatrician Earl Bradley, who was convicted of sexually abusing patients and videotaping the encounters.

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