A Toronto-area woman accused of using a false name to work as a nurse at a long-term care home in Mitchell, Ont. is facing additional charges, and it may not be the first time.

Eva Donna Okello faces three new charges, two of them related to drug trafficking, because she wasn't qualified to administer medication while she allegedly impersonated a nurse.

The third new charge is common nuisance endangering life. She had already been charged with personation with intent to gain advantage.

The 36-year-old allegedly used a false name to work one Saturday shift as a registered nurse at the Ritz Lutheran Villa.

Bob Petrushewsky, CEO of Ritz Lutheran Villa, says "We were notified that an agency nurse who had worked for us was not the person she said she was."

Due to the ongoing investigation, Petrushewsky says he can't release the name Okello allegedly used or the name of the employment agency that sent her.

All 85 patients at the facility are safe and unharmed.

OPP say the situation came to life after Stratford police made a routine traffic stop and Okello provided false information.

Perth County OPP Const. Kees Wijnands says "The officer, being very astute in what he was doing, got ahold of us and said this person was working in your area, you might want to look into this."

It also appears this is not the first time Okello has faced similar allegations.

According to a press release issued in September 2011 by The College of Nurses of Ontario, a person by the same name was also convicted of identity theft and working as a nurse without proper qualifications.

It reads "The College of Nurses of Ontario participated in the successful prosecution of an Ontario woman charged with identity theft and working as a nurse without proper qualifications. On September 30, 2011, Eva Donna Akinyi Okello was sentenced in Ontario court to eight months in jail. Her DNA has also been ordered into the national databank system."

It also says Okello was found guilty of charges of being an illegal practitioner in 2005 and fined $8,000.

The College says it has been in contact with the OPP regarding Okello's arrest, but the degree of its involvement has not yet been determined.

The OPP can't confirm or deny if the woman in custody is the same one who was previously convicted.

The long-term car home, OPP, Ministry of Labour and Ministry of Health are all not involved in the investigation.

Okello returns to court on Thursday.