How can a warrant be issued with no criminal complaint?
Probable cause that a crime was committed ... :-)
The warrant was signed by the judge in order to gather the evidence from the equipment to show whether the crime was committed and gather the details about that crime.
As I've said on the other threads on this crime that was committed... if you're a criminal who just committed a crime -- don't write a big article in some national publication about committing the crime and give all the details of the crime to boot ... LOL ...
I mean, it's like having some criminal go on national TV telling about his crime he's committed and then he wonders why the police arrest him afterwards ... :-)
The police and authorities would probably have never known about the crime ... except that the writer of the publication wrote about his crime. I think the police and authorities "read" too ... doncha know... :-)