Yeah, I'd shy away from the word "punishment" as this child has already been traumatized by stuff no child should ever have to go through which could very well feel to her like punishment of some kind anyway.

Also remember one minute per age (5 minutes) ... Because time and space to a child is perceived totally different than it is to an adult, and sit with her for those 5 minutes if you have to in order to ensure she observes the timeout.

Utilize the time explaining that since she did this, she must sit in time out until she learns that it isn't okay to do whatever it is she did to be put into timeout in the first place.

I hope that made sense and wasn't too redundant or like a run on sentence!