A 22-year-old man appeared in a Regina court Monday charged in connection with the death of his 18-month-old stepson.
The boy was taken to hospital in critical condition last Thursday after police received a call about an injured person.
Police arrested Jason Brian Emil Will that evening and charged him with aggravated assault.
The toddler died in hospital on Saturday.
Police and the coroner's office continue to investigate circumstances surrounding the death of the youngster, whose name has not been released.
Crown attorney Chris White said charges against Will could end up being much more serious depending on results of the autopsy, expected Tuesday.
"If it can be shown the accused somehow applied force that caused the death of the baby then we could be looking at a manslaughter or something else," he said.
Will's mother cried when the Crown opposed her son's release on Monday.
The accused began to cry too as his family blew him kisses as he was taken out of court.
The infant's family remained quiet throughout the proceedings although the child's mother left the courthouse holding one of the child's stuff animals.
The case was set over until Tuesday afternoon.