RCMP visited the boy at school a number of times and spoke with him about various previous investigations in the community, east of Regina.
There's no further information about those investigations or their outcome.
Now, the boy is believed to have been involved in the beating death of Lee Bonneau, 6.
Bonneau was last seen playing outside a recreation centre with some dogs one evening nearly two weeks ago when his foster mother lost sight of him. After a 90-minute search, he was found in a nearby open area with serious head injuries.
Another boy was there with blood on his clothes, according to information obtained by CBC News. That boy is suspected in Bonneau's death.
The young suspect has been apprehended by social services in Saskatchewan. But he is under 12 years old — too young to be charged with the crime.
If he is found to be responsible, he will be one of the youngest killers in Canadian history.
More details are expected at a news conference on Tuesday.