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,

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

Although fatal epileptic seizures—referred to as Sudden Unexpected Death in Epilepsy—are rare, they pose a significant risk for individuals with the disorder, often occurring while the victims are asleep, as was the case with Aber.

In a statement, Aber’s family said they “expect more information from the medical examiner in the coming weeks.”

“Our family is in shock and grieving deeply, and we respectfully request privacy as we attempt to navigate through our unspeakable loss,” the family added in a statement.