Call the sheriff and see if they will come to the next pick-up. Have your child stay with someone else so they don't see it.
I would actually wait until "drop-off" that way they can nab him on his way out of town and the child is none the wiser and there are less questions as to why Daddy isn't there that weekend???
I also disagree with Mom42 the circumstances are quite relevant. I'm of the opinion that I would rather try and figure out a way of dealing with the issues (non-payment) and try to get SOME $$ versus throwing the guy in jail thereby guaranteeing NO MONEY!!
As opposed to him being out of jail and not paying?
Sorry that argument doesn't hold water. For the simple reason that if he was paying his child support, he wouldn't have ended up in jail.
It isn't up to the original poster to figure out his issues. If he has a problem with the amount or lost a job, the onus is on HIM to file for a modification. Not her.
Which, according the original poster, this guy is choosing not to do.
BTW, there are ncp's who only pay some of their child support but not all of the court ordered child support. This guy isn't paying anything. At all. His circumstances are irrelevant, his actions are. And one of them is not filing for a modification.