Just my 2 cents on PA custody concerns - Years ago, we had a custody issue with my DSDs. They lived with us in NJ and were visiting with their mother in PA over Easter vacation. She got tired of them
and wanted us to pick them up immediately. We couldn't (I worked in NYC - had a 2 hr commute home and then she was 3 hours away and we only had one car). We said we would pick them up the next day. I took a personal day and we left early in the morning to get them. She was so angry that we didn't get them the night before that she refused to open the door. She's bi-polar and I guess started a bad turn.
I went to call the police (before cells) while DH tried to reason with her through the door. I explained the whole situation and they refused to come out even though we had our custody order in hand. They said that unless it clearly stated that the police were to get involved, and they had that order on file at their office, they considered it a domestic issue and we had to deal with our attorneys.
I don't know if things have changed in PA but I do know there was no help whatsoever with a custody concern even when we stated we felt the children could be in danger.