really a more emotional rick gates, this whole i have had a change of heart and now the guilty pleas, how often do you see something like this? what does it indicate to you? >> you generally don't see letters published like this because most cases where people plea don't have this kind of attention on. it's done privately and quietly. he obviously wanted to send a statement to a broader public here. that's why it's happened in this case. i'm sure it happens often. i'm someone who pled guilty at one stage and warned my family ahead of time. i didn't have a change of heart because i felt that way for a long time. >> on gates' flipping, help us understand what kind of information he can provide to help them in their larger investigation. >> it's clear that they want manafort and they're putting a