"Of course you worry. I'm a victim, I'm a witness,” he said. “When you convict people, the victim has to be somewhat concerned. I'm a little concerned about my family. I didn't ask for all these threats."
Sheridan said the Maricopa County Sheriff’s Office had endured “years of threats” against Arpaio, including $4 million bounties on his head, but the bomb package raised the threats to a new "height of seriousness."
“What evidence we have indicates that had someone opened that package, it would have created a major explosion and caused serious physical injury, burns, and maybe death,” Sheridan said. “That is a very serious threat.”
Arpaio said he receives many packages, some of which he opens personally. The person who sent this package would be brought to justice, he said.
"I'm not going to be intimidated by anyone, that's a promise," he said.
Arpaio won his sixth election as sheriff of Arizona’s most populous county last November, but his office is not without controversy.
His unconventional law-enforcement methods – including dressing inmates in pink underwear – and strong stance against illegal immigration have brought Arpaio national attention, the Monitor reported last year. According to the Associated Press, he has cost the county $25 million in legal settlements over inmate treatment in county jails. His critics also charge that his office has failed to investigate more than 400 sex-crime cases and that the deputies racially profile Latinos in traffic patrols.