Um, what? Robert Wagner has declined to be interviewed in the new investigation into wife Natalie Wood’s death, according to a police detective on Friday. Wagner was interviewed by authorities shortly after Wood’s mysterious death by drowning in 1981, and his attorney insists now that Wagner and his family has cooperated fully with the investigation over the past 30 years. Los Angeles Sheriff Dept. Lt. John Cornia said Friday that he Wagner did not give a reason why he would not interviewed in the latest investigation, in which police have spoken to more than 100 people since reopening the case in 2011.