ORONO, Minn. -- Prominent Twin Cities businessman Irwin Jacobs shot and killed his wife, Alexandra, before turning the gun on himself, the Hennepin County medical examiner confirmed Friday, April 12. According to the medical examiner’s office, Alexandra Jacobs died of multiple gunshot wounds; the manner of her death was described as a homicide. Irwin Jacobs’ manner of death was suicide; he also died of multiple gunshot wounds. Their bodies were found Wednesday morning in their Lake Minnetonka mansion. They were both 77.