Nearly 31 years after actress Natalie Wood drowned while on a boat cruise off Catalina, the LA County Coroner has changed her death certificate from "accident" to "undetermined," reports TMZ. The investigation was re-opened last November after the boat's captain made comments that raised doubts about how she died. Authorities still believe Wood drowned, but the issue is how she ended up in the water, and detectives are saying that some of the bruising on Wood is inconsistent with drowning. Also on the boat were husband Robert Wagner and Christopher Walken. Click for more.