Cyntoia Brown, the Nashville woman who was sentenced to life in prison at age 16 for fatally shooting a child predator who reportedly solicited her for sex, has been granted a federal court date during which judges will hear oral arguments challenging her sentence as unconstitutional.

Brown, now 29, has been incarcerated since 2004. She was convicted of murdering 43-year-old Johnny Allen and was given a life sentence with the possibility of parole after serving 51 years.

Advocates for Brown, which include celebrities such as Kim Kardashian and Rihanna, have said that she was a victim of sex trafficking who feared for her life while in Allen’s company.

According to reports, the prosecution argued that Brown acted knowingly in the situation, while her defense claims she feared for her life and did not have the mental state necessary to be culpable for murder.

As reported, the 6th U.S. Circuit Court of Appeals has scheduled a June 14 court date for the case, which will take place in front of a three-judge panel in Cincinnati.

Brown’s case was previously examined in the 2011 documentary Me Facing Life: Cyntoia’s Story. Rihanna recently helped the spotlight return to Brown, sharing a now-viral post on Instagram calling for social justice reform and questioning why an underage girl involved in prostitution was given such a harsh sentence.