Gregory Lynn Shrader, 55, is suspected of dropping off the parcel,
filled with gunpowder and other materials, at a U.S. Postal Service
mailbox in Flagstaff, Arizona, but the package was intercepted by
state authorities before it reached Arpaio, according to the U.S.
Postal Inspection Service.
The device was later rendered harmless by police.
Shrader was arrested last week and is being held without bond at the
Tulsa County Jail, where he is awaiting release to the custody of
U.S. marshals, according to the county's website.
He was charged in a criminal complaint with one count of willfully
making a threat through the U.S. mail.
Arpaio, the sheriff of Maricopa County, has drawn criticism for his
aggressive stance on illegal immigration. He was the subject of a
U.S. Justice Department probe over his office's treatment of
Hispanics and has been scrutinized for housing county inmates in a
Spartan "Tent City" jail.
He has also been the subject of multiple threats of violence.
"I understand that with being a high-profile sheriff, sometimes they
don't like me, but they don't have to blow me up and make all these
vicious overtures," Arpaio told Reuters on Tuesday.
In an incident unrelated to Shrader's case, a 15-year-old boy in
Canada was arrested on Tuesday on suspicion of threatening to kill
Arpaio five times over the past eight months, the Maricopa County
Sheriff's Department said.
Arpaio, who is considering running for Arizona governor in November,
said the threats have encouraged him to "fight harder" to do his
job. "Nothing's going to scare me away," he said.
[to top of second column]
The Phoenix branch of the U.S. Attorney's Office, which is
prosecuting Shrader, was not immediately available for comment.
The Federal Bureau of Investigation and the Postal Inspection
Service led the investigation into the package bomb, according to
statement released by the agencies.
Federal agents arrested Shrader after conducting a search of his
home in the small city of Jay, Oklahoma, on Thursday and finding a
document with an image that closely resembled the return address
label on the package in question.
Interviews with potential witnesses and video footage of the area
where the package was mailed led authorities to Shrader, officials
(Reporting by Laila Kearney in San Francisco;
editing by Steve
Gorman and Lisa Shumaker)
[© 2014 Thomson Reuters. All rights
Copyright 2014 Reuters. All rights reserved. This material may not be published,
broadcast, rewritten or redistributed.