Ask HN: How is software used in complicated legal cases?

Just curious if anyone can comment on how software is used these days in complicated legal cases ( e.g. money laundering on an international scale with thousands of people involved, many layers of corporate structures, and terabytes of emails along with information obtained via wiretaps etc).

How is this information collected and correlated in an automated fashion? Does it assist in organization, simplification and presentation of exhibits?

Or is all of this still done manually?

Obviously IANAL but I'm very interested to hear how software is changing the practice of law. Thanks!