There are many reasons that the Brandon DOJ could be prosecuting Gillum.
IMHO, the most likely is that Gillum has no power and no possible political future so he has been picked to be the token democrat that they prosecute. The democrats and the lamestream media (same thing) can then point to him to show that the Brandon DOJ is being totally unbiased and non-political while they continue their witch hunt against Republicans.
Good theory - that’s makes sense. But I suspect it’s more insidious...