Does he know more than he's letting on?

We caught Robert Wagner waiting for his car at a Beverly Hills valet yesterday, and the legendary actor stayed mum when photographers asked him about the suspicious circumstances surrounding former wife Natalie Wood's untimely death. Awkward!

The Pink Panther star and pal Christopher Walken were aboard the same boat when the iconic actress fell overboard and drown, and new information regarding the tragedy has led to the case being reopened.

Rescue boat captain Roger Smith, who headed the lifeguard team that searched for Wood, claims Wagner waited too long to call for help, possibly on purpose.

"Wagner could have saved his wife. But he didn't. Robert Wagner should be charged with manslaughter! I believe he is responsible for death!" Smith recently told The Enquirer.

And the mystery deepens!