We have a cause of death for former Buffy the Vampire Slayer and Gossip Girl star Michelle Trachtenberg.

Following a review of laboratory test results, it was determined that Trachtenberg died naturally as a result of complications from diabetes mellitus, the New York City Office of Chief Medical Examiner told Deadline in a statement.

Trachtenberg was found unresponsive in her midtown Manhattan apartment February 26. Paramedics pronounced her dead at the scene. No foul was suspected. She was 39.

The coroner’s office initially said her cause of death would remain undetermined because the family had requested that no autopsy be conducted because of religious reasons. The medical examiner’s office would automatically do an autopsy if foul play or criminality was suspected, but there was none, so the office did not overrule the family’s decision. Following the lab test results, the medical examiner’s office amended the cause of death.