A skillful attorney will argue that you've acknowledged the appropriateness of the other parent as a caretaker by your own action in leaving the child in their care. Primary parent is described in the manual section VIII-12. NOW, otherwise, cold feet, pressure from your spouse or family or claimed loss of memory may cost you the proof needed to win your case and to present the truth to the court. Consider random curb side garbage pick-ups for valuable information and use of private investigators. If your spouse has an expert , then you should have one.
Experts can base their opinion on otherwise inadmissible evidence such as hearsay.
Disclose the name of your expert before the deadline to do so, otherwise , you may not be able to use his or her testimony. Then stress your positives.