Yep. There was no immediate threat to pull and fire. For that matter that would have been something that the 5 to 10 minute police response time would have been fine if he called the police first and had them check it out.
The girls probably lied through their teeth because they got caught sneaking out, so they're partially responsible for it too.
Far as the neighborhood watch goes they did nothing wrong at all that I can see.
Patrolers themselves should have some easily identifiable ,prominently marked jacket or vest ,and optional cap.All should be numbered,and the person who has a sign,vest,etc. recorded.
All should have a photo ID badge which has been recorded at Watch headquarters,even if the headquarters is the watch captains desk at home.
Watch persons need training that emphasizes the absolute requirement to identify themselves to anyone they stop,and need to be trained on the limits of their authority.