This week, guest host Latoyia Edwards speaks with local reporters about their new stories. Phillip Martin, WGBH News, talks about the solving of a 1992 murder using DNA technology that could solve other cold cases. Nidhi Subbaraman, Boston Globe, reveals how virtual reality is being used to treat diabetic patients. Rupa Shenoy, WGBH News, explains how healthy food is getting even more expensive.