That's a bad start. Concur with my colleagues.

In 2014 my son-in-law was charged with Poss CS PG 1-5 G (f) Meth, got it reduced to under 1 G and plead guilty and was given 3 ?

Evading with a vehicle is his highest charge, a 3d degree, 2 to 10. He will likely spend more time on his state jail charges than the 3d, as state...

What could happen?

I concur with my colleagues. Stop making admissions and consult with an attorney in private.

Will probation make my wife and I split up or stay in different homes since we are both on probation

Unless one of you is the victim of the other, any such requirement would be highly unconstitutional. Make sure your lawyer stands up for you.

What is the announcement document in district court

I'm thinking more like an arraignment docket, where the charge is read to a defendant and the defendant enters a plea. Talk to the lawyer.

Words alone are not justifiable provocation. Yes, you will go to jail. Grow up.

How will a prosecutor look at this case?

You had better have a really good attorney. Police/prosecutors like to disenfranchise everybody. They don't give up just because somebody says...

If I haven't gotten call from detectives after week, nor have I been interviewed or anything post police report should i worry?

Agree with Ms. Krummel. And it almost always takes far longer than a week. Just remember if there IS follow-up contact it will likely be very bad...

I got a domestic violence case with my boyfriend and a cps case.. Can i still show up to his case against me?

If there is a case of any known mf against you, you don't get to not show up.

Deferred cannot be denied because of residence.