Picking a Case on behalf of another

Im looking at implementing my first Customer Service Hub environment and things are going well.

However, I do have a few quick questions.

Is it possible to assign the worked on of a case to another person.

I know a user can pick a case, and then they are shown as working on it, but is it possible for say and admin to pick a case for someone else and if they release it then have the ownership revert back?

Also, is it possible to release a case from your active cases or a tier 1 dashboard?

Thanks in advance

Lee