The local health authority is also probing what happened inside the hospital room, and one of the nurses involved has already been fired.
Disturbing video captures nurses in Canada taunting and berating a dying Indigenous woman within the final moments of her life.
Echaquan's husband stated he's destroyed over his spouse's death.
Mother-of-seven Joyce Echaquan was a victim of disparaging and degrading remarks shortly before her death Monday at the Joliette Hospital.
A minimum of one of many nurses was sacked following the incident, which was lambasted by Indigenous leaders for example of systematic racism that occurs far too usually and goes ignored within the nation, The Guardian reported.
In the footage, Echaquan expressed distress and cried for help from her hospital bed, while two nurses called her stupid and stated that she was "only good for sex".
Echaquan's family said the mother had a heart problem and believe she died after she was given too much morphine. Her relatives told Radio-Canada that she had a history of heart trouble and was anxious that she was being given too much morphine.
As well, Quebec Premier François Legault announced that a nurse had been fired.
We want to hear from you: what critical stories and perspectives are missing from our coverage of systemic racism around the world?
A forensic pathologist accountable for examining deaths in suspicious situations or due to neglect will likewise check out her death.
But "it is also very often the fruit of government policies which lead to systemic discrimination", he added.
In a tweet, Perry Bellegarde, National Chief of the Assembly of First Nations, said the incident showed that discrimination against indigenous people in Canada's healthcare system remained prevalent.
A vigil for Ms Echaquan was held outside the Joliette medical facility on Tuesday night and a demonstration is prepared in Montreal at the weekend.
Past year a government inquiry found that Canada was complicit in "race-based genocide" against indigenous women.
Quebec published its own report a year ago, following a public inquiry into the relationship between indigenous people and the provincial government services.
In June, a video showing a forceful arrest of a Canadian indigenous leader by Royal Canadian Mounted Police over an incident involving an expired license plate was criticized by Prime Minister Justin Trudeau.