When talking with the police... you need to be very careful.... and you need to understand ALL of the laws. I would speak to lawyers and police in the place where you live to get a good understanding of what to say and what not to say. You could end up digging your own grave... or just adding years to your sentence....
Use of force laws usually talk about when you can use what amount of force. I have yet to see one that says that you can use a certain level of force, if and only if you control their fall. Either you can use that level of force or you can't.... easing their fall after using that level of force does not change anything....