hoping someone out there can help me with the following questions. They spring from 2 of my books...

1) Who has the authority to issue a BOLO? Does a Homicide Detective or does this get routed through a superior (ex. a Serg or Lieutenant)

2) When a criminal file is locked, who does this? Court order? Does someone higher up in the police department have the authority to view it with a password (ex. the Chief of Police).

2b) and related to the last question, if it is a court order that locks a person's file, is a court order all that can reopen it?