Henry's interview would be by specially qualified police/sw and videoed so it could be used in any criminal or civil proceedings. Given Rob and his parents are certain to claim H shouldn't be with his mother such an interview should help the little boy. Well, we hope so anyway,
Relationship Investigations in the Digital Age: Contact Wizard Web Recovery
Cheating Spouse Concerns and Digital Evidence: Contact Wizard Web Recovery


I suppose a year would be about right as I am always amazed how long it can take things to come to court.
