(1) Evidence of an admission is not admissible unless the court is satisfied that the admission, and the making of the admission, were not influenced by:
(a) violent, oppressive, inhuman or degrading conduct, whether towards the person who made the admission or towards another person; or
(b) a threat of conduct of that kind.
(2) Subsection (1) only applies if the party against whom evidence of the admission is adduced has raised in the proceeding an issue about whether the admission or its making were so influenced.