Friend in jail, should we get him out or leave him there?

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My friend went to jail a week ago. He called me and one other friend. We want to get him out but also want to know if the wife can help. He was driving drunk and when he got there they found out that he had two bench warrants, one for child support in another county. we called his wife and she cussed us out and told us to mind our business. right now he only has to finish out 3 weeks but stands a chance at losing his job. Should we get him out or leave him there? Obviously his wife has no intention on doing anything because hes still there. And the fact that another kid is involved that she did not know about is hurting her im sure.