UPDATE

MCSO: Canadian teen makes 9th threat against Sheriff Arpaio

Posted: Updated:
(AP Photo: Ross Franklin) (AP Photo: Ross Franklin)
PHOENIX (CBS5) -

An 18-year-old Canadian man who has threatened to kill Maricopa County Sheriff Joe Arpaio nine times during the past two years again caused alarm at the sheriff's downtown headquarters.

The Maricopa County Sheriff's Office said the suspect posted another email threat to kill Arpaio and blow up his office downtown.

Bomb-sniffing canines canvassed the downtown Phoenix headquarters Friday morning for potential explosive devices, MCSO said. None were located.

Deputy Chief of Special Investigations Edward Lopez said his detectives have enlisted federal authorities to assist in the investigation.

Lopez said they'll continue the investigation until the suspect can be extradited to Arizona to face felony charges.

MCSO said the teen had been awaiting sentencing for his previous threats when Arpaio received an email allegedly sent by the teen threatening to stab him. The teen was arrested the same day.

The teen's threats against the sheriff have also appeared online at the sheriff's website.

"Arpaio, I have not forgotten you. You think you are tough s***? I'm going to stab you 100 times before I decapitate you, you grease ball ***.  I'm f*** serious. Your hours are numbered my friend. You're gonna die today, not tomorrow."

The teen's first threat against Arpaio was made in July 2013 and directed at his wife, children and grandchildren. The teen said he would murder Arpaio and his family, and bomb his house.

The second threat came in October when the teen promised to open fire on the sheriff and his wife, and make sure the sheriff simply "vanishes."

In the third threat, made in November, the suspect said he was planning to kill the sheriff with a Glock handgun.

The fourth threat occurred in January 2014 and came shortly after his release from a psychiatric facility near Alberta, Canada, where the court had ordered him to a 30-day stay.

The teen emailed the sheriff's website and said that he "will never stop until I am put away for good. I hate you so much that I will travel to Arizona to chop off your b**ls with a meat cleaver and turn you into a woman."

Arpaio said while he worries about the safety of his family, he's "concerned about what could occur in Canada." 

"What will Canadian authorities say when this young man, who fits the profile of so many who have killed, picks up a gun in his hometown and starts shooting?" Arpaio said. 

Copyright 2015 CBS 5 (KPHO Broadcasting Corporation). All rights reserved.