Are there any Vietnam veterans stationed in CaLu between Christmas 1967-February 1968 that can help with some information?

I have a friend who is looking for more information on her dad who was killed on Valentine's Ridge on Feb. 14, 1968. Looking for anyone who may have known him or have information on that day, or if you know of someone who may have been there that day. Just trying to help a friend get information she's been seeking for a long time.

Edit: Here's a little extra information — He was a Navy Corpsman who served the Marines in the field. He was assigned to Kilo Company 3rd Battalion 9th Marines 3rd Marine Division.