his wife can testify against him for anything thus far except for a capital offense,i beleive.the supreme court had recently ruled that a divorced spouse can testify in a capital crime now.as long as it isnt a capital crime there shouldnt be a problem.but the courts will scrutinize her purposes of doing so,in otherwords,they will want to know what her motives,of intent,that would allow her morals to stand against her mate,and if they find in their opinion that she would testify for her own possible future benefits,they will more than likely question your source.a question that i have is does your ex,pay child-support?if not youll have a good rebuttel for the best intrest of the child.but you must have a legal court orderd custody,to state that you have legal custody.but if the father has not seen for the best intrest of the child,then i do not beleive that he will have a chance.its a tricky situation whether to choose to use your sister or not.though she undoubtedly will affirm to the court that their is an unstable family life in his residence.which is a positive outlook to you,but once again on the other hand,they may find under the circumstances,that she may be contemplating a divorce,which may yeild her the benefits under a divorce decree,and thus deprive his equal protection rights.one can never speculate how a judge may render their verdict,what they base it on,the laws,or case precedence.i am not an attorney,please consult with one in your area.good luck,friends.
[Edited by daniel123456 on 06-04-2001 at 09:20 PM]