History - gangland killing at the country club

[Radio]

Trying to research a bit of Tulsa area
history.

A wealthy landowner, as well as other interests,
reportedly with organized crime ties, was
killed in a gangland killing, when he got out
of his car at a local country club.  He owned a
lot of land near Mounds OK, as well as I am sure other places.

This would have been after 1963, probably
well after.

Anybody have any idea of what I am talking about?  Any more information?