My question involves child support in the State of: Louisiana

Wife and child left Mississippi and moved to Louisiana. Divorce granted in Mississippi 1993. I was ordered to pay $200 a month in child support until 18 or if child was in college to 21. Also ordered to pay half college tuition. Visitation was every other weekend, parents meet in Baton Rouge for the exchange.

In 1995 I moved to Louisiana, because mother refused to meet me and court denied contempt charges. Mother asked that the case be moved to Louisiana. I agreed. Went to court for increase in child support. Child support increased to $300 a month. Visitation was still an uphill battle.

In 2005 I moved to Nevada. Began paying $400 a month voluntarily. Visitation still uphill battle.

In 2008 I moved back to Mississippi. Continued paying $400 a month voluntarily. In 2009 ex wanted to make it official. I signed an agreement to increase support to $400 in lieu of going to court.

2011 child turned 18. He wrote a letter saying that he moved out of the house and does not want me to know where he is living. Letter had anti-semetic statements about his 7 year old Jewish half sister (with my current wife). Said he is going to college, but refused to provide any documentation. Mother also refused, saying via text message it is "between ya'll". I reached out to grandmother and grandfather. Both refused to provide college documentation or give my son's new address.

Various text messages from son said he will never see this side of the family again.

Mother says son is on 100% full scholarship. Dropped out of first college, remained living on his own. She says he is now back in college, but still refuses to provide documentation. She maintains it is up to son if he wants to provide information about college or his whereabouts.

Mother recently became disabled and is relentlessly harassing me to send child support and college money, despite the fact she says his college is paid for. She is now threatening legal action.

My question is: Should I wait to be served or make a preemptive strike and petition the court to suspend child support?