I love Lady Heather,  Lady H has some kind of hold on him that is so powerful, I loved this episode, forget Sara, anyway the reason Gil knows that she's a diabetic was from Season 3 episode Lady Heather's Box, she mentioned it when he offered to put tea in her coffee? something like that she became a suspect in that episode because the vic had stab marks similar to that of a (diabetic's) injection pen, I hope they do more Lady H stories, she a real ratings grabber