Toxicology results for Adrienne Martin are back, but officials with the 's office are still evaluating those results as they try to determine what killed her.
Martin was the girlfriend of former CEO August Busch IV. She was .
Forensic administrator Suzanne McCune said Monday that a pathologist will look at the toxicology report and several other factors such as medical records and microscopic examinations in determining the cause of death for the 27-year-old woman. She says it is possible a determination could be made this week.
Busch said he awoke around 11 a.m. Dec. 19 and tried to awaken Martin, but couldn't.
