You better get your corporate approved spiel, and STICK TO IT!
You are walking a very fine line between saying to little (which then hurts your conscience, assuming you have one), and saying to much, which then gives them something legal to come back at you with.
Either way, YOU take the bullet when something bad happens.
Without training and legal guidance, you are walking a minefield with no map.
Don't push back, since you are not a team player if you do, but make sure you get the support you need.