Sutton's time of 16:07.15 bettered the former mark she set in 2008 by one-hundredth of a second. She finished more than eight seconds ahead of second-place finisher Bonnie Brandon of Mission Aurora (16:15.96), while Olympian Kate Ziegler (Great Falls, Va.) of the Fish was third in 16:19.12.
Sutton and Ziegler also went head-to-head in the 1000y free and 500y free, with Sutton coming out on top of the 1000 and Ziegler winning the 500. Ziegler finished the meet with three medals, one of each color.
Brandon, meanwhile, went on to win her fifth medal of the meet in the women's 200y back, in which she finished second behind Stephanie Proud of Gator Swim Club by seven-hundredths of a second - 1:57.06 to 1:57.13. The win marked Proud's third medal of the meet, her first gold.
Cal Aquatics' William Copeland made it a clean sweep of the sprint freestyle events Sunday, winning the men's 100y free in 43.60. Copeland also won the 200y free on opening night and the 50y free Saturday.
Washington State's Michaela Ahlin and Longhorn Aquatics' Michael Klueh (Evansville, Ind.) each collected their second gold of the meet Sunday, with Ahlin winning the women's 200y butterfly (1:58.04) and Klueh winning the men's 1650y free (15:01.25). Ahlin won the 100 fly on day 1, while Kleuh won the 500y free Saturday.
Other first-place finishers Sunday included Swim Florida's Erika Erndl (Naples, Fla.) in the women's 100y free (50.49), the University of Michigan's Dan Madwed (Stamford, Conn.) in the men's 200y fly (1:46.44) and Minnesota's Karl Burdis in the men's 200y back (1:51.31). It was Erndl's fourth medal of the meet and Madwed's second, the first gold for each.
For complete results, go to the 2009-10 USA Swimming Grand Prix Swim Meet Page
