Jay, it seems, had been running away from a foster home, repeatedly. To us, it didn't look like running away: It looked like unsupervised play. But the lady was his social worker, and when three police cars and an ambulance showed up, they were able to confirm her story.
Jay began to cry, buried his face in Cris's stomach, told her he didn't want to go. She and a couple of the other park regulars calmed him down, and eventually he agreed to get into the ambulance. The social worker said he'd be "Section-twelved." We had to look that up after they left: It means sent for psychiatric evaluation in a locked facility for up to 72 hours.