My brief always advises to never voluntarily talk with the police.
And if they do arrest and question you, to never admit you were there, and be as vague as possible with no factual content in your answers.
"I don't remember her, that was 20 years ago, I don't remember being there" ............. etc.
This isn't cowardly, this is simple self preservation for anyone, accused of anything, guilty or innocent.