Arresting them now wouldn't make any sense. The whole system is too corrupt. The corrupt judges and paid off juries would let them go. We have know for years who these people are. There is a reason why none of them is in prison. Money talks and bullshit walks.
This stops only when their system all comes crashing down. The money that they have is what gives them their power. It all needs to be seized. Until that happens we will continue to watch them walk free, thumb their noses at the law, and laugh at us.