IF YOU MISSED THE FOUR books, the headlines, the mini-series starring Heather Locklear, then here's your big chance: dine at Ft. Worth's $6 million Stonegate Mansion, where oilman Cullen Davis allegedly tried to kill his wife. In 1976, with her divorce pending, Priscilla Davis and her beau asked restaurateur Walter Kaufmann back for a drink. He declined. On arriving home, Priscilla was shot and her lover killed. Cullen was acquitted of murder and later abandoned the mansion in bankruptcy. Now Kaufmann and his partners have made the home a restaurant, with seating in the old conversation pit and "playroom." Next: pool-side brunch.