The Edmonton police were called on March 29 to a residence where the baby was not breathing.
On 6 April, medical authorities reported to the police that a fatal dose of methamphetamine had taken the infant away.
The doctors added that the dose of the drug found in the girl’s body could not be passed on to her through breast milk. Only hypotheses of oral or anal ingestion were retained.
Scott Pattison, an Edmonton police spokesperson, described the deal as horrible.
Michelle Rice, unknown to the police, was introduced as a single mother.
The police investigation will seek in particular to know the identity of the people who visited his residence in the days before March 29.