7. Lauren Spierer

Lauren Spierer was a 20-year-old Indiana University student who disappeared in 2011. She was last seen in the early morning hours after a night out with friends in Bloomington.
Security cameras and witness reports confirm she was near a friend’s home around 4:30 a.m. After that, she was never seen again. Despite searches and an active investigation, no clear answers have been found. Her case is still open, and her disappearance continues to raise questions.