Answer:
Either would be good depending on context.
Explanation:
Ok, for this one I think that you could use either, depending on your context. if you are writing something from the perspective of when she was on the supreme court then you can use the first one. but if it is from the perspective of her legacy, or of an opinion she has right now about when she was a supreme court justice it might be best.
Hope this helps!
~B
