What we know so far about Brian Nadler, the doctor charged with 1st-degree murder

Dr. Brian Nadler was arrested at Hawkesbury District General Hospital on Thursday evening as Ontario Provincial Police investigate several suspicious deaths at the hospital.

The next day, Nadler appeared in court and was charged with one count of first-degree murder.

Alan Brass, Nadler's Ottawa-based lawyer, says his client maintains his innocence.

Details are still emerging about the 35-year-old, who lives inDollard-Des-Ormeaux, Que., but here is what CBC News has learned so far.

• Doctor charged with murder after multiple deaths at Hawkesbury, Ont., hospital
• OPP calls murder charge against doctor a 'traumatic experience' for Hawkesbury

2 unprofessional conduct charges

After graduating from Montreal's McGill Universityin 2010, he went to theUniversity of Alberta for surgery and internal medicine until 2014, according to anonline databaselisting his post-graduate training.

According to theCollge des mdecins du Qubec,Nadlerdid internshipsat theMcGill University Health Centre in 2012, 2013, 2016 and2017.

He is licensed to practise in Quebecbut has never practised in the province as a physician and hasnever been registered with the college.In order to practise medicine in Quebec, a physician must have a permit to practiseandbe registered, the regulatory body said.

Following that, Nadlerdid aresidency at the University of Saskatchewan's medical school from July 2014 to September 2018.

During that time,he faced two unprofessional conduct charges, the College of Physicians and Surgeons of Saskatchewan said.

Documents showone charge wasfor allegedly calling a female colleague a "bitch" after an argumentandtelling someone else he "felt like slapping" that colleague. Another charge involvedpatient record-keeping.

The events linked to both chargesallegedly occurred the same dayin August2014.

The college said he apologized and tooka pair of courses about ethics and record-keeping. It did not proceed any further with the charges.

Nadler left to become a geriatric fellow at the University of Nevada, RenoSchool of Medicinein September2018.

He returnedto Canada and became licensed with the College of Physicians and Surgeons of Ontario in February2020.

It is unclear exactly whenNadlerbegan working in Hawkesbury, which is located between Ottawa and Montreal.

His next court appearance is scheduled for April 6.