My character Olivia was a victim of parental kidnapping when she was eleven. She hasn't had any contact with her father since. Now, I can find lots of information on international child abductions and on parental abductions post-divorce, but Olivia's parents were still married at the time (ie, her mother had custody) and she was taken across state lines, but remained within the US. I know that California has a law against parental child abductions, but I can't find out when it was enacted or whether it covers cases where the parents were still married.
So. My gut feeling is that what Olivia's mother did is very, very illegal. However, I don't know how illegal it is, or when it became illegal (when her mother kept her away from her father past a certain number of days?). Any information would be helpful.
Searches tried: "parental child abduction," "interstate child abduction," "child abduction facts," "child abduction California," and various combinations of the phrases "parental", "interstate" and "abduction."