Mayfield is being held as a material witness under a federal statute designed to protect the identity of grand jury witnesses.
I am beginning to suspect that there is an Oregon cell, and that there is a federal grand jury investigating it and that this attorney probably arranged (either knowingly or unknowingly) for many of the immigration documents of the cell's members. That would connect to the "more arrests" aspects within the emerging story as well.
Thanks for the heads up. I really wonder if there might also be an email or web-chat room link between this Oregon lawyer giving out immigration advice to European cell members trying to get into the US for terrorist missions? Inquiring minds want to know!