Aleksandr Zhukov has consistently denied involvment since his arrest in Bulgaria.

It's the kind of issue that could further delay a trial that's already nearly two years in the making.

The request comes after a federal judge ordered thhe release of another defendant from the same facility.

The arrest is the latest evidence the feds' investigation into the Methbot scam is ongoing.

The men are two of the three who were extradited to the U.S. within the last year.

And now we know the group called itself "Metan," the Russian word for methane.