Friendly reminder that if law enforcement asks you for data, you can fight it in court, but they can require you to preserve the data while you fight. Deleting data under such protection could end with you facing an obstruction of justice charge.

Better yet is for the government to not even know the data existed, non? (Of course, you'd better make damn sure that they had no way of knowing before.)

And when you do this they go ahead and convict you for that instead often much easier than whatever they were trying to get you for in the first place.

The person in the example got to use any criteria she wanted to distinguish personal from work email (which seemed to be sorting on keywords and phrases), do all this privately before turning the work emails over, and IIRC charge the government for the time it took. If she had co-located, I bet they could have carted that server away, and her person would have to do the same process in some office with officials in and out of the room and over their shoulder.