I remember this guy telling me about how his parent's comic book store was vandalized by spiclings. They called the cops, who obviously showed up to late since the kids were already gone. That seemed like a pussy move on their part.

The following is according to

https://en.wikipedia.org/wiki/Citizen%27s_arrest#United_States - "Citizen's arrest - Wikipedia"

"In the United States a private person may arrest another without a warrant, for a crime occurring in their presence. For which crimes this is permitted may vary state by state.[64]

Common law

Most states have codified the common law rule that a warrantless arrest may be made by a private person for a felony, misdemeanor or "breach of peace"."

A citizens arrest of children who vandalized important property is not kidnapping.