According to NBC News's San Francisco station, after he was indicted, on February 6, 2015, Harcevic fled thmid-west, for California, where he once lived. However, he was quickly apprended. They reported he was held, for a month, in secret, and in isolation, in Santa Clara County Jail's high security wing. Security was so tight that Harcevic was accompanied by three armed guards, for the duration of his stay. Secret detention is unusual, but can be authorized for cases related to national security.
On March 30, 2015, Charlie Swift, director of the Constitutional Law Center for Muslims in America, agreed to take Harcevic as a client. Swift is known for his defence of Salim Hamdan, formerly Osama bin Laden's driver, whose habeas corpus appeal went al the way to the US Supreme Court.
On October 8, 2015 Harcevic challenged his conspiracy charge, asserting that, to be charged, he needed to be linked to a specific crime.
In April 2017 Harcevic and four of his alleged co-conspirators filed a motion callingfor their charges to be dropped, arguing that Pazara, the fighter whose hostilities they adided had been a lawful combatant, who fought for militia's supported bythe United States.
- "Armin Harcevic". Counter-terrorism Project. Archived from the original on 2016-08-03. http://web.archive.org/web/20160803130902/http://www.counterextremism.com/extremists/armin-harcevic. Retrieved 2017-10-03. "Missouri-based Armin Harcevic is a Bosnian immigrant and suspected facilitator for foreign extremist groups, allegedly including the Nusra Front and ISIS.* In early February 2015, Harcevic was arrested on charges of conspiring and providing support to a terrorist organization."
- Christine Mai-Duc (2015-02-08). "6 Bosnians living in U.S. charged with aiding militants in Syria, Iraq". Los Angeles Times. Archived from the original on 2017-09-29. http://web.archive.org/web/20170929182319/http://www.latimes.com/nation/nationnow/la-na-nn-indictment-bosnians-assistance-terrorists-20150206-story.html. Retrieved 2017-10-03. "According to the indictment, the group collected and donated money to be transferred to intermediaries in Syria and Iraq or used to purchase U.S. military uniforms, combat gear and tactical equipment to be sent abroad."
- Adam Goldman, Jia Lynn Yang, John Muyskens (2017-6-23). "The Islamic State’s suspected inroads into America". Washington Post. Archived from the original on 2017-07-03. http://web.archive.org/web/20170703151241/https://www.washingtonpost.com/graphics/national/isis-suspects/. Retrieved 2017-10-03.
- Robert Handa. "High-Level Terror Suspect Secretly Held at Santa Clara County Jail". NBC News (http://web.archive.org/web/20170410163010/http://www.nbcbayarea.com/news/local/High-Level-Terror-Suspect-Secretly-Held-at-Santa-Clara-County-Jail-362725981.html). http://www.nbcbayarea.com/news/local/High-Level-Terror-Suspect-Secretly-Held-at-Santa-Clara-County-Jail-362725981.html. Retrieved 2017-10-03.
- Robert Patrick (2015-03-30). "Lawyer who represented Bin Laden's driver now helping defendant in St. Louis terrorism case". St Louis Post Dispatch. Archived from the original on 2017-10-04. http://web.archive.org/web/20171004011632/http://www.stltoday.com/news/local/crime-and-courts/lawyer-who-represented-bin-laden-s-driver-now-helping-defendant/article_eaacc09c-628b-5d5f-8050-cb43ff68c4ff.html. "Charles Swift, director of the Texas-based Constitutional Law Center for Muslims in America, represents Armin Harcevic, who faces charges of providing material support to terrorists and conspiracy."
- Robert Patrick (2015-10-08). "Terror funding defendant seeks case's dismissal in St. Louis federal court". St. Louis Post-Dispatch (St. Louis, Missouri). Archived from the original on 2016-12-25. http://web.archive.org/web/20161225203314/http://www.stltoday.com:80/news/local/crime-and-courts/terror-funding-defendant-seeks-case-s-dismissal-in-st-louis/article_32bf6a22-09c0-5b0f-b0b4-bfddf8039a32.html. Retrieved 2017-10-03. "Harcevic’s lawyers also say that the law under which Harcevic and the others were charged requires prosecutors to prove that they supported a specific crime, like murder, rather than simply that he supported Pazara. The indictment doesn’t make that claim, the lawyers say."
- Matt Apuzzo (2016-04-10). "Only Hard Choices for Parents Whose Children Flirt With Terror". New York Times (Fremont, California): p. A1. Archived from the original on 2016-04-14. http://web.archive.org/web/20160414054204/http://www.nytimes.com:80/2016/04/10/us/parents-face-limited-options-to-keep-children-from-terrorism.html?_r=0. Retrieved 2017-10-03. "With his son under F.B.I. investigation and facing few options, Mr. Shafi arranged for him to visit a suspected terror financier, Armin Harcevic, in a nearby jail. Mr. Shafi told the F.B.I. that he hoped it would help him “see the error in his ways or at least the grave consequences,” according to court documents."