Lawyer for US Detainee in Iran Says Hostage Release Could Be Simplest Element of Nuclear Talks

Six American citizens sit in Iranian prisons. A fragile ceasefire holds after 40 days of war. And the lawyer for one of those prisoners says getting them home should be the least complicated part of whatever comes next.

Ryan Fayhee, who represents detained Iranian-American journalist Abdolreza "Reza" Valizadeh, told reporters on April 20 that a hostage release "is the easiest problem on the table to solve, and both sides should acknowledge that" [1]. His argument: with the U.S. and Iran already attempting to build trust through nuclear negotiations, releasing wrongfully detained Americans would be the most straightforward gesture of good faith available to Tehran.

Not everyone agrees it is that simple. Roger Carstens, the former U.S. Special Presidential Envoy for Hostage Affairs who served under both the first Trump and Biden administrations, warned days earlier that Iran will use the detainees as a "sweetener" to steer nuclear negotiations "in the direction of Iran" [2]. His blunt assessment of Iranian negotiating culture: "You cannot trust the Iranians up until the last second" [2].

The tension between these two views — hostage release as trust-builder versus hostage release as leverage tool — sits at the center of one of the most consequential diplomatic negotiations of the decade.

The Six Americans in Evin Prison

At least six U.S. citizens are currently held in Iran, though only a handful have been publicly identified [3]. Each has been held at Tehran's Evin Prison, a facility notorious for its use in political detentions since the 1979 revolution.

Reza Valizadeh, 49, an Iranian-American journalist, was arrested by Iran's Islamic Revolutionary Guard Corps (IRGC) in September 2024. After what a petition to the United Nations described as a sham trial lasting less than an hour — in which the judge acted as both prosecutor and adjudicator — Valizadeh was sentenced to 10 years in prison on charges of "collaborating with a hostile government," a vague national security offense routinely applied to journalists and activists [4]. The State Department designated him as wrongfully detained in May 2025 [5].

Kamran Hekmati, 61, a jeweler and longtime resident of Great Neck, New York, was detained at Tehran's Imam Khomeini International Airport on May 17, 2025, while attempting to return to the United States after a family matter. He was formally arrested on July 28, 2025 — less than two weeks after U.S. strikes on Iran's nuclear facilities began. Hekmati was sentenced to two years for having traveled to Israel 13 years earlier to attend his son's bar mitzvah, under a law criminalizing Iranian citizens for visiting Israel. He subsequently faced additional charges alleging meetings with Mossad agents abroad [4]. Secretary of State Marco Rubio designated Hekmati as wrongfully detained in March 2026 [6].

Afarin Mohajer, 70, a Los Angeles resident, was arrested at Tehran's Mehrabad Airport on September 29, 2025, by IRGC Intelligence. She was charged with posting propaganda critical of the Islamic Republic and insulting its Supreme Leader. Her son, Reza Zarrabi, a political activist based in Germany, has said he believes his mother was arrested to silence his opposition to the regime. Mohajer suffers from cancer and a brain tumor [7].

The identities of the remaining three detainees have not been publicly confirmed. United Against Nuclear Iran maintains a broader list of 13 American and Western citizens and residents held on what the organization describes as fabricated charges [3].

The Price of Previous Deals

The United States has a four-decade pattern of pairing financial concessions with hostage releases from Iran. The scale of those concessions has varied, but the pattern is consistent.

Source: Congressional Research Service / Washington Institute

Data as of Apr 21, 2026CSV

In 1981, the Algiers Accords ended the 444-day Iran hostage crisis by unfreezing approximately $7.9 billion in Iranian assets, establishing the Iran-United States Claims Tribunal, and creating a $1 billion settlement fund [8].

In 2016, coinciding with the implementation of the Joint Comprehensive Plan of Action (JCPOA), the Obama administration secured the release of four American captives — including Washington Post journalist Jason Rezaian — while exchanging seven jailed Iranians and airlifting $400 million in cash to Tehran as part of a $1.7 billion settlement of a decades-old arms deal dispute [9].

In September 2023, the Biden administration secured the release of five Americans detained for years in Iran, including longtime hostage Siamak Namazi. The deal involved the release of nearly $6 billion in frozen Iranian funds held in South Korean banks — money Seoul owed Tehran for oil purchased before U.S. sanctions took effect in 2019. The funds were transferred to restricted accounts in Qatar, designated for humanitarian purchases only [10].

Critics have consistently argued that these arrangements create a moral hazard. Former hostage Emad Shargi has said that "every time there are talks scheduled between Iran and the United States," it becomes "open season for hostage taking in Iran" [11]. Former hostage Nizar Zakka described the practice as a "business model," and Australian academic Kylie Moore-Gilbert, herself a former prisoner in Iran, observed a hierarchy: "Foreign prisoners fetch the highest price" [11].

The Atlantic Council has characterized the cycle bluntly: the Algiers Accords "resulted in a decades-long vicious cycle of unfrozen funds begetting the freedom of Americans, which only incentivized the Islamic Republic to replenish its prisons by arresting Western nationals on bogus charges in search of further concessions" [12].

The Harder Problems: Enrichment, Centrifuges, and Lost Knowledge

If a hostage deal is the "easiest problem," the nuclear file is where the difficulty compounds. The technical gaps between the two sides are substantial and, in some respects, wider than at any previous point in negotiations.

Source: IAEA Quarterly Reports

Data as of Feb 27, 2026CSV

Iran's stockpile of uranium enriched to 60% — just below weapons-grade — has grown from zero in early 2021 to an estimated 440 kilograms as of February 2026 [13]. The country has approximately 14,689 advanced centrifuges installed at its Natanz and Fordow facilities, with a total of roughly 21,900 installed centrifuges including older IR-1 models [13].

The two sides remain far apart on enrichment timelines. The U.S. has reportedly demanded that Iran halt all enrichment for 20 years. Iran has offered five years [14]. Iran has proposed resuming enrichment up to 20% using up to 30 cascades of advanced IR-6 centrifuges, with no accumulation of enriched uranium gas and broad IAEA oversight [13]. The U.S. position views this as insufficient.

A separate and possibly more dangerous gap involves the International Atomic Energy Agency's ability to verify anything Iran agrees to. The IAEA reported in February 2026 that it has "lost continuity of knowledge in relation to the production and current inventory of centrifuges, rotors and bellows, heavy water and UOC [uranium ore concentrate], which it will not be possible to restore" [13]. Since losing access to Iranian enrichment facilities in February 2021, the agency cannot confirm the current size or composition of Iran's enriched uranium stockpile, cannot verify whether enrichment has been suspended, and cannot account for Iran's centrifuge inventory [13].

The Arms Control Association assessed in March 2026 that U.S. negotiators arrived at talks "ill-prepared for serious nuclear negotiations with Iran," lacking a coherent framework for addressing these verification gaps [15].

Legal Precedent and Constitutional Tensions

The practice of executive-branch hostage negotiations conducted alongside or as a side channel to broader diplomatic talks has drawn scrutiny from legal scholars and legislators for decades.

The Algiers Accords themselves were signed as an executive agreement rather than a Senate-ratified treaty, a distinction that has shaped constitutional debate ever since. During those negotiations, U.S. negotiators explicitly acknowledged that the Constitution prohibited the executive branch from unilaterally transferring frozen assets, insisting that only courts acting independently could order such property transfers [8]. Yet subsequent administrations have routinely used executive authority to structure hostage-related financial arrangements without formal congressional approval.

The Iran-Contra affair of the 1980s — in which the Reagan administration secretly facilitated arms sales to Iran, partly to secure the release of American hostages held by Iranian-backed groups in Lebanon — remains the most prominent example of executive overreach in this domain. The affair resulted in congressional investigations and multiple criminal convictions, and established a lasting precedent that covert hostage negotiations carry significant political and legal risk [16].

More recently, the 2023 prisoner swap drew criticism from Republican lawmakers who characterized the $6 billion transfer as ransom. The Heritage Foundation called it a "ransom payment" that "fuels their terror machine" [17]. Defenders of the deal, including Biden administration officials, countered that the funds were Iranian money held in restricted humanitarian accounts, not U.S. taxpayer dollars, and that the arrangement followed legal precedent dating to the Algiers Accords [10].

Families Caught Between Administrations

The families of detained Americans have pressed both the Biden and Trump administrations, with varying degrees of receptivity.

Under Biden, families of detainees — including those freed in the 2023 swap — reported frustration with the pace of negotiations and what they saw as insufficient urgency. Siamak Namazi, who spent nearly eight years in Evin Prison before his release in 2023, publicly criticized the Biden administration from inside prison in an unprecedented media appearance, pleading for more aggressive action [18].

The Trump administration has taken a different posture. In February 2026, it formally designated Iran as a "state sponsor of wrongful detention" — the first such designation under an executive order designed to deter countries from illegally detaining U.S. citizens [19]. Jewish advocacy groups, including the American Jewish Committee, have called on Trump to make the return of Americans in Iranian custody an "urgent national priority," stating: "The United States must be unequivocal: the wrongful detention or hostage-taking of Americans will not be accepted or sidelined" [20].

The families have pointed to the administration's record on other hostage recoveries — the Trump administration has reportedly secured the release of over 70 Americans from hostile regions since January 2025 [20]. But Iran presents a different challenge. Carstens, who negotiated with Iranian counterparts under both administrations, has said Iran is "unlike any other foreign government" he has worked with in hostage recovery [2].

A central frustration for families is the structural separation between hostage and nuclear negotiations. The Washington Post reported in April that the potential nuclear deal under discussion "is not expected to include any provisions about the release of American hostages, which are often handled through separate negotiations" [21]. Fayhee's argument — that a hostage release should be folded into the trust-building phase of nuclear talks — directly challenges this separation.

The Mediators and the Road Ahead

If a hostage release were achieved independently of a nuclear deal, the remaining negotiation steps would still require extensive third-party mediation across multiple tracks.

Oman has served as the primary mediator in the 2025-2026 negotiations, hosting indirect talks between the U.S. and Iran in Muscat. On February 6, 2026, Oman's foreign minister Badr bin Hamad Al Busaidi facilitated the first round of indirect talks [22]. NPR described Oman's approach as distinctive: "Oman stays out of wars and listens, does not impose its agenda, and has been known to be the facilitator, the quiet listener" [23].

Qatar, Turkey, and Egypt have also entered the mediation effort, presenting Iran and the U.S. with a framework of key principles including commitments to limit uranium enrichment, restrict ballistic missile use, and curtail the arming of Iran's regional allies [22]. The European Union and the E3 (France, the United Kingdom, and Germany) have sought involvement but were not included in the direct Muscat talks [22].

The ceasefire that took effect on April 8, 2026 — ending 40 days of sustained U.S.-Israeli military operations targeting Iran's nuclear facilities, missile infrastructure, and leadership — remains fragile [24]. A U.S. naval blockade of Iranian ports via the Strait of Hormuz went into effect on April 13 after peace talks in Islamabad collapsed [25]. The underlying drivers of the conflict, as CSIS assessed, "remain not only intact but, in some cases, intensified" [25].

How Iran Compares to Other State Adversaries

The speed and terms of U.S. hostage recoveries from Iran differ markedly from those involving other adversarial states. The structural reasons illuminate why Fayhee's characterization of the hostage issue as "easiest" is, at minimum, relative.

With Russia, the U.S. secured WNBA star Brittney Griner's release in December 2022 after roughly 10 months of detention, exchanging her for Russian arms dealer Viktor Bout in a one-for-one swap [26]. Wall Street Journal reporter Evan Gershkovich's release took 17 months, culminating in an August 2024 exchange involving 24 people across seven nations — the largest East-West prisoner swap since the Cold War [27].

With Iran, timelines have been far longer. Siamak Namazi spent nearly eight years in Evin Prison before the 2023 swap. The current detainees have been held for periods ranging from roughly seven months (Mohajer) to over 18 months (Valizadeh). Carstens has stated directly that Iran is a tougher negotiating counterpart than Russia, China, or even the Taliban [2].

The structural difference is that Russia, despite its hostility, operates within a framework of direct diplomatic communication with Washington. Iran and the U.S. have no formal diplomatic relations, requiring intermediaries for every exchange. Iran's internal power structure — split between elected officials, the IRGC, and the Supreme Leader's office — also means that no single counterpart can guarantee implementation of an agreement.

The Incentive Problem

The steelman case that Iran benefits disproportionately from linking hostage releases to nuclear talks rests on a straightforward incentive structure: if detaining Americans consistently produces financial concessions and diplomatic leverage, the rational response is to detain more Americans.

The data offers partial support. Roughly 100 American citizens have been taken hostage by Iran since 1979 [12]. Detention patterns have historically correlated with periods of diplomatic engagement: former hostage Emad Shargi's observation that scheduled U.S.-Iran talks create "open season for hostage taking" is echoed by the timing of recent arrests [11]. Hekmati was detained in May 2025, weeks before nuclear negotiations began. Valizadeh was arrested in September 2024, as back-channel discussions were underway.

Defenders of engagement counter that refusing to negotiate does not protect Americans — it simply leaves them in prison longer. The Trump administration's designation of Iran as a state sponsor of wrongful detention is designed to create costs for the practice without foreclosing negotiation [19]. Whether that designation produces deterrent effects remains to be seen.

Fayhee's position — that a hostage release is the easiest problem — may be strategically correct even if the moral hazard concern is valid. The question is whether solving the easy problem first makes the hard problems harder, by rewarding the behavior that created it.

That calculation, more than any legal or technical question, is what will determine whether six Americans come home before or after a nuclear deal — or whether the two tracks remain separated by design.