In February 2005, Rosemarie Essa was in a minor car accident, and though she suffered no physical injuries she died shortly afterwards at a Cleveland hospital. Her best friend, Eva McGregor, suspected Rosemarie's husband, Yazeed Essa, had tampered with her calcium supplements the morning of the day she died. Tests on the pills revealed Rosemarie had died of cyanide poisoning. But when police went to charge Essa, they learned he had fled the country, resulting in an international manhunt. “48 Hours" Correspondent Troy Roberts reports. This classic "48 Hours" episode last aired on 6/1/2013. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.