04/14/2015 12:28 EDT | Updated 06/22/2015 07:59 EDT

Lee Bonneau inquest hears boy accused of killing 6-year-old was already troubled

The 10-year-old boy accused of killing Lee Bonneau, 6, on a reserve in southern Saskatchewan in 2013 already had "serious" issues, according to a social worker who dealt with him.

The inquest into the death is hearing from more than a dozen witnesses who described events leading up to Lee Bonneau's killing. The inquest has also learned details about the troubled early life of the boy known only as L.T. — Lee's alleged killer.

Pat Santo, a child protection investigator who worked for Yorkton Tribal Council Child and Family Services, told the inquest Tuesday that almost as soon as he was hired he was told that RCMP were interested in meeting and discussing L.T.'s case.

"I could tell there was something serious going on there that needed some attention," Santo said.

Lee Bonneau was found badly beaten on the Kahkewistahaw First Nation after walking away from a bingo he had been at with his foster mother.

The coroner's jury hearing the case can make findings on the circumstances and cause of the death. It can also make recommendations to prevent similar incidents in future.  

Read CBC's live coverage from the inquest.