Criminally Obsessed on Instagram: "Where is Sabrina Heinz? She vanished after a late-night stop and her car was later found abandoned. It has now been a week, and the 49-year-old mother and grandmother still hasn't been found. Heinz was last seen around 10 p.m. on January 28 at a Shell gas station on S.C. Hwy. 200 in Winnsboro, South Carolina. When she didn’t show up for work two days later on January 30 — something coworkers say was completely out of character — her employer activated GPS track