TORONTO -- An Ontario regional coroner says an inquest into the death of seven-year-old Katelynn Sampson has been scheduled to begin on Nov. 9.

Dr. Roger Skinner says the inquest is expected to take four weeks and will hear from about 30 witnesses.

Katelynn was killed by her guardians, Warren Johnson, 50, and Donna Irving, 33, in Toronto after they beat her for months until sher body went into septic shock.

The pair was convicted of second-degree murder and sentenced to life in prison with no chance of parole for 15 years.

Her mother, Bernice Sampson, was addicted to crack and gave her daughter to Johnson and Irving in a misguided attempt to save Katelynn.

It was later revealed that a judge granted custody to Irving despite her criminal convictions for prostitution, drugs and violence.

Irving and Johnson also called Children's Aid Society saying they no longer wanted the child, but their call was transferred to Native Child and Family Services because Katelynn was half-Anishinabe.

It took a case worker 16 days to contact Irving, but by then she said she was getting help from Katelynn's school, which wasn't true.