'Kat' McDonough on the stand, Day 2Photo 1 of 5 Kathryn McDonough testifies Wednesday how she saw Elizabeth "Lizzi" Marriott's arms curl up as her boyfriend was strangling her during testimony in Strafford County Superior Court in Dover. McDonough is the state's key witness against her former boyfriend Seth Mazzaglia, charged with first-degree murder in the 2012 death of Marriott of Westborough, Mass. in Dover. (Pool Photo by Jim Cole/Associated Press)
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