Who Killed Diane Jenkins on Y&R?

As Jamey Giddens asked on Twitter, “What does Maria Arena Bell have against water? Brad (Don Diamont) froze to death, Colleen (Tammin Sursok) drowned, now Diane's (Maura West) floating in water. Does she prefer diet coke???” Check out this week’s The Young and the Restless promo after the jump!