Section 305.1. Custody by a private person

1. A private person may take a
  child under the age of sixteen into custody in cases  in  which  he  may
  arrest  an  adult  for  a  crime  under  section  140.30 of the criminal
  procedure law.
    2. Before taking such child under the age of sixteen into  custody,  a
  private  person  must  inform the child of the cause thereof and require
  him to  submit,  except  when  he  is  taken  into  custody  on  pursuit
  immediately after the commission of a crime.
    3.  After  taking  such child into custody, a private person must take
  the child, without unnecessary delay, to the child's home, to  a  family
  court, or to a police officer or peace officer.