The Washington Supreme Court is weighing whether transferring Amber Kim, a trans woman, from a women's prison to a men's facility constitutes cruel punishment under the state constitution. It is the first case of its kind before this court. A favourable ruling grounded in state law would be beyond the reach of the current US Supreme Court.

What happened to Amber Kim

Amber Kim had been housed at the Washington Corrections Center for Women. In 2021, after the Department of Corrections introduced a policy guaranteeing gender-affirming care and housing, she was moved there. Then, in 2024, following a sexual encounter with her roommate that she describes as consensual and that the department has never alleged was an assault, she was transferred to a men's prison.

She subsequently chose to remain in solitary confinement, because she was afraid for her physical safety. A woman, transferred to a men's facility over what her own lawyers called a "routine infraction," decided that isolation was safer than general population.

The legal argument, and why it is carefully constructed

Kim is not arguing under federal law. She is arguing under Article 1 of the Washington Constitution, which prohibits cruel punishment. Her legal team at the ACLU is asking the court to find that her transfer failed both tests set by a 2021 ruling: that it created a significant risk of serious harm, and that it was not reasonably necessary to serve a legitimate purpose.

The state's deputy solicitor general argued the transfer was needed to manage "the risk of problematic sexual activity." The department has stated it believes truly consensual sexual relationships are rare in a prison setting, though it has made no allegation that this particular encounter was anything other than consensual. Justice G. Helen Whitener pressed directly on why Kim was treated differently from the way a cisgender woman would be in the same situation. That is exactly the right question.

The deliberate choice to argue under state rather than federal law is not an accident. Given the current composition of the US Supreme Court, advocates are increasingly turning to state constitutions as the more reliable ground. If Washington rules in Kim's favour on state law grounds, that decision cannot be reviewed federally. It stands. The Transgender Law Center's Shawn Thomas Meerkamper was plain about the strategy: expect more and more cases in state courts. Washington may be setting a template.

The wider picture in the US

This case does not exist in isolation. A federal judge has recently ordered the Bureau of Prisons to continue providing hormone medications to trans people, and separately found that transferring trans women to men's facilities, when they had previously been housed in women's facilities, was likely to violate the Eighth Amendment. The US Department of Justice's Civil Rights Division has opened investigations into Washington's own housing practices, as well as those in Maine and California.

Meanwhile, the anti-trans organisation Women's Liberation Front brought a case in California arguing that gender-affirming housing policies endangered other incarcerated women. That case was dismissed. In Washington, similar lawsuits have been filed, including one from a woman who alleges she was assaulted in 2025 by a trans woman who had been transferred from a men's facility. That allegation is serious and deserves to be taken seriously, but one alleged incident cannot be used to argue that trans women as a group are dangerous. The logic does not hold, and courts have generally recognised that.

What safety actually means here

The thing that stays with me in this case is the solitary confinement. Amber Kim was not placed in solitary: she chose it, because the alternative felt more dangerous. That is what the transfer produced. A woman, legally recognised in her gender, making the calculation that four walls and no contact was safer than being among the men she had been placed with. The department says housing decisions are not permanent and that trans people receive routine reviews. That may be true. It does not address what is happening to Kim right now.

People tell me, often, that debates about trans people in prisons get framed as a conflict between the safety of trans women and the safety of other incarcerated women. I understand why that framing gets traction. But it sets up a false opposition. The question in Amber Kim's case is not whether safety matters. Of course it does. The question is whether her transfer was a proportionate response to a consensual encounter, or whether it was arbitrary treatment that exposed her to serious harm. Justice Whitener asked exactly that. The court's answer, when it comes in the months ahead, will carry weight well beyond Washington.