A child protection investigator says a 10-year-old who killed a younger boy on a southern Saskatchewan reserve is deeply troubled and didn't get the care he needed.

Patrick Santo with the Yorkton Tribal Council Child and Family Services testified Tuesday at the coroner's inquest into the death of six-year-old Lee Bonneau.

Lee was found with head injuries in a wooded area on the Kahkewistahaw reserve in 2013.

Santo said he couldn't get the 10-year-boy to talk, saying he would pull his hoodie over his head and turn away from him.

"I used every tool I had. I didn't get a lot out of him."

At one point during the meeting, Santo said the boy said he heard the voices of a man, woman and baby. After 2 1/2 hours of trying to interview the boy, Santo quit.

"My stamina was fazed at that time so I just gave up," Santo said.

Santo also testified there was a lack of recordkeeping and he didn't have all the information he needed to do his job, including a psychological assessment or history.

The worker said Yorkton Tribal Council Child and Family Services was trying desperately to modernize its recordkeeping and computer systems. Santo also said there was a disconnect in information sharing between him, the RCMP and the school the boy attended.

Santo said the size of his caseload prevented him from adequately performing the duties of his job.

"Going through my notebook gives me nightmares," he said.

Santo was an RCMP officer prior to working for the tribal council and said policing was never as stressful because they had the proper tools and resources. He said his office could have used another two investigators.

Kelly Watson also worked with the RCMP before working as a child protection investigator with the tribal council. He also said limited information was exchanged between agencies.

Watson said some files were so heavy he couldn't update them properly or in a timely manner.

RCMP have previously told the inquest that the 10-year-old was the subject of complaints including inappropriate sexual behaviour, animal cruelty and break and enters.

Saskatchewan's children's advocate determined the boy, whose name is under a publication ban, had behavioural issues and probably shouldn't have been in the community unsupervised.

He could not be charged under the Youth Criminal Justice Act because he was under 12.