A Biden-appointed U.S. attorney, who resigned on President Donald Trump’s first day in office, had been battling epilepsy before she passed away in her sleep, her family disclosed this week.

Jessica Aber, 43, formerly the top prosecutor in Virginia’s Eastern District, was found unresponsive at her Washington, D.C. home on Saturday. Police indicated that she most likely died of natural causes, noting that she had “a longstanding medical issue,” according to DailyMail.com.

Aber’s case will remain open until the Office of the Chief Medical Examiner of Virginia determines the manner and cause of her death.

Meanwhile, her family told ABC News that she had suffered from epilepsy and epileptic seizures for many years. According to the Centers for Disease Control, this condition can lead to fatal asphyxiation or heart issues.