An aspiring model who died at the home of former Anheuser-Busch chief executive August Busch IV had a rare heart condition, according to her ex-husband. Adrienne Martin, 27, was found dead at Busch's suburban St. Louis home on Dec. 19. The St. Louis Post-Dispatch reported [that] it took someone at Busch's mansion more than 40 minutes to call 911 after Adrienne Martin was found dead at 12:30 p.m.. Frontenac police, who responded to the scene, did not disclose her death until four days later. Officials said an initial autopsy was inconclusive and didn't reveal signs of trauma to her body or obvious natural causes of death. A ruling stating the cause of death is expected after results of toxicology tests come back. That could take up to six weeks. In 1983, Busch, then a 20-year-old University of Arizona student, left a bar near Tucson, Ariz., with a 22-year-old woman. His black Corvette crashed, and the woman, Michele Frederick, was killed. Busch was found hours later at his home. He suffered a fractured skull and claimed he had amnesia. After a seven-month investigation, authorities declined to press charges, citing a lack of evidence. Two years later, Busch was acquitted on assault charges resulting from a police chase that ended with an officer shooting out a tire on his Mercedes-Benz.