It would be especially detrimental to the pursuit of justice if the friends, family, and lawyers of a suspect could find out whether or not a warrant has been issued for them or their stuff before it is executed.
Our system works on “trust but verify”. If the cops show up with a warrant they claim they is valid, you trust the warrant is valid, let them do the search, and later verify the warrant is real and that it was issued legally. Doing otherwise is a crime (obstruction of justice).
