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Arroyo was last seen in Kauai County, Hawaii on March 14, 2006. He and his pregnant fiancee, Christina Michelle MacNees, were staying with MacNees's friend, Aurora Solveig Fehring Dingwall, and Aurora's husband, Alan Gareth Dingwall, and their son, Rowan Dingwall, on the Dingwall family's six-acre property. Another friend, Timothy Noonan, was also staying with the family. Aurora's business partner was a landscaper, Carl Wayne Rotstein. They were all going to celebrate MacNees and Arroyo's wedding, and Rowan's second birthday was a few days later.
That morning, after forty days of rain, the Kaloko Dam was breached and spilled an estimated 400 million gallons of water on the Kauai North Shore community below it. Arroyo, MacNees, Rotstein, Noonan and the Dingwall family were all swept away. Alan, Aurora and MacNees's bodies were later found; photos of them are posted below this case summary. The other four victims have never been located.
Arroyo, Noonan, Rotstein and Rowan are all presumed drowned, but their bodies have never been located.
Top Left: Christina MacNees;
Top Right: Alan Dingwall;
Bottom Left: Aurora Dingwall;
Bottom Right: James Pflueger