Death by Jello by S. Furlong-Bolliger

Bailey isn't too thrilled with the fact that she had to bring a jello salad to her real estate office's Thanksgiving party, and even less happy when her boss suddenly drops dead after eating it. When the police arrive to investigate, Bailey soon finds that the world of selling houses is a LOT more cutthroat than even she had realized. A short story from our Fingerprints line.