“”1) A federal judge supervising a grand jury...”
A grand jury? Really? I’m not sure I believe that.
I've wondered the same thing.
If a law enforcement officer presents an affidavit to a judge outlining probable cause that a crime has been committed and that search and seizure of certain specific evidence will further the investigation of such crime, then I think a judge can issue a search warrant.
I don't think that a grand jury finding is required.
I vaguely recall that O.J. Simpson's lawyers wanted a speedy trial, no doubt in order to catch the prosecution unprepared to make their case. They waived the requirement for an indictment and had a hearing before the judge to decide whether sufficient evidence existed to allow the prosecution to go to trial. The judge decided there was and the trial proceeded.
Prior to the trial probably several search warrants were obtained, including one which allowed taking blood from O.J.