Robert Wagner Signs Off on Natalie Wood Photo

12/14/2011 2:00 AM PST

Robert Wagner
refuses to ignore his history with Natalie Wood -- despite the fact he's a person of interest in a renewed investigation into her death.

Wagner made an appearance at a movie theater in Florida last night -- and on the way out, he agreed to sign a classic photo featuring himself with the actress who mysteriously died after the two had an argument on a boat back in 1981. 

As we previously reported, Wagner's not officially a suspect in the investigation -- but there's been widespread speculation that investigators are looking into the possibility that he was responsible for Wood's untimely demise.