Again, I'm not sure where you've had your head buried for the past year or so, but there have been tons of arrests within the Trump administration, unlike Hillary Clinton and her 9 Benghazi Republican hearings over 4 years.
If you're referring specifically to Trump and/or his family, I don't think they wanted to piece meal the violations he & his family have had since taking office. You have federal AND state charges on all of them, actually. The only way I can see Trump walking away from the federal charges is to resign ... otherwise, he's in for a very costly fight and the tax payer money won't always be available for him.
This situation with our president is continuing to develop daily. I believe the Democrats have finally said ... time to play hard ball. Lets just see where it goes over the next month.
Jail time?
I'll wait and see.