california - my husband of 3 years has just been notified by the county that an ex-girlfriend of his is claiming that a son she had 6 years ago is his. she lied to my husband 6 years ago and said that it was not. since then she has been married and now divorced. will my husband be responsible for back child support if the DNA test is positive? in addition her neighbors have complained to the landlord that she has neglected her children including the son in question. would we have a chance of getting custody of this child on basis of neglect if he is my husbands? what kind of evidence would we need to build a case?