The young person appellant and an adult co-accused were charged separately with murder.
The appellant was compelled to testify at the adult's preliminary inquiry, during which the Crown extensively questioned him about his own involvement, leading to self-incriminating statements.
This compelled testimony was then used to elicit incriminating evidence from another witness, who later testified at the appellant's trial.
The Court of Appeal held that the Crown's predominant purpose at the preliminary inquiry was to build a case against the appellant, violating his section 7 Charter rights against self-incrimination.
The derivative evidence should have been excluded.
The appeal was allowed and a new trial ordered.