(NewsNation) — The boyfriend of a dual Russian-American citizen who is being detained overseas on suspicion of treason said she’s “reading law books” to pass the time in a Russian prison.

Chris Van Heerden joined NewsNation’s “The Hill” to discuss what he’s learned from Ksenia (Karelina) Khavana’s letters.

“She’s exercising, meditating, reading a lot of books about law. Going outside, which she did not do for almost six weeks. So she’s doing a little bit better,” Van Heerden said on “The Hill.”

The couple traveled to Turkey together before she continued on to Russia to visit family, but she was detained at the airport.

Khavana moved to the U.S. to study ballet and received U.S. citizenship when she married an American. The couple later divorced, and Khavana was recently working at the Ciel Spa in Los Angeles.

She’s is currently being detained as a “preventative measure” during the investigation. If convicted of treason, she could face up to 20 years in a Russian prison.

Van Heerden said he doesn’t think U.S. government officials are doing everything they can to bring Khavana home.

“She’s not home. I am very hopeful that we will get Ksenia wrongfully detained, declared soon. And that’s a problem right now. I’ve asked, ‘What’s holding this up?’… They have assured me that they are trying to get closer to Ksenia every single day. This is, at the moment, not possible because Russia does not recognize the dual citizenship,” Van Heerden said.

WHAT IS SHE ACCUSED OF?

Russia’s Federal Security Service alleges that Khavana had been “proactively” raising funds for a Ukrainian organization since February 2022 — money that it says was “subsequently used to purchase tactical medicine, equipment, weapons and ammunition by the Ukrainian Armed Forces.”

The agency said she also took part in “public actions” in the U.S. in support of Kyiv. It did not provide further details about the allegations.

Koretz said Khavana actually was collecting funds for humanitarian aid and had made a donation to Razom for Ukraine, a U.S.-based nonprofit that says it provides medical kits and disaster relief to those affected by Russia’s invasion of the country.

“We’re talking about diapers and formula, that’s what she was collecting money for,” Koretz said. “We’re not talking about money for weapons.”

In its own statement, the nonprofit’s CEO said she was appalled by media reports of the arrest but did not name Khavana or confirm whether the woman had previously donated to the charity.

The organization said in an email to The Associated Press that it does not disclose the identities of its donors to protect their privacy.

“Razom calls on the U.S. government to continue to do everything in its power to demand that President Putin release all those unjustly detained by Russia and to hold Russia’s political and military leadership accountable for their unprovoked invasion of Ukraine,” Dora Chomiak said in her statement.

NewsNation’s Steph Whiteside and the Associated Press contributed to this report.