TORONTO - The family of a young woman who died in prison is questioning whether the coroner's inquest can truly get at the heart of what happened.

Nineteen-year-old Ashley Smith choked herself to death in an Ontario prison in 2007.

While the inquest is expected to be lengthy, her family believes certain evidence won't be heard and that will leave the jury with an incomplete picture.

Smith's mother says she has completely lost confidence in the process.

The family is concerned there will be too much focus on the last day of her life, when they say the conditions she endured for the whole 11 months she was in federal custody led to her death.

It is open to the jury to find her manner of death, and her family believes it was not a suicide but an accident, because Smith had been harming herself believing the guards would save her.

The inquest begins tomorrow.