Of course he wasn’t arrested, or you would see the booking photo 24/7 on every station in the country, and on the front page of every paper. The propaganda war continues.
If he wasn’t booked then he was never charged. They just had him come in for questioning.
The way the process usually works is someone files a complaint. The agency writes up the report. If there’s enough evidence, an indictment is written up. The person either walks in or is brought in for booking on that indictment.