Teacher Found Alive After Puzzling Disappearance Cops still aren't sure what happened to Indiana woman By Rob Quinn, Newser Staff Posted Jun 22, 2016 12:34 AM CDT 35 comments Comments Krista Perdue. (Tippecanoe School Corporation) (Newser) – "This is the best result you could ever hope for—for people to be OK," Tippecanoe County Sheriff Barry Richard said late Tuesday after missing teacher Krista Perdue was found alive. The 42-year-old, who was last seen Sunday night and was reported missing Monday, was found lying near a retention pond close to her Indiana home. "When she was first located, she was disoriented; she was unable to communicate," the sheriff tells the Lafayette Journal & Courier. "She had to be roused to get her semiconscious and ... able to talk." He says Perdue, who appeared to be uninjured, was mumbling and rescuers couldn't understand what she was saying, although she appeared to understand what they said to her. Perdue was taken to a nearby hospital. She has a chronic digestion problem and became ill on Sunday, the day after she returned from a vacation with her husband and 12-year-old daughter. It's still not clear why she disappeared or how she came to be lying in undergrowth near the pond. Authorities don't seem to believe foul play was involved, although they haven't ruled it out, and Chief Deputy Steve Hartman says subpoenas have been issued in the case, reports News 18. Perdue is a second-grade teacher at Woodland Elementary School, where teachers and other staff members gathered Tuesday afternoon to hold a prayer vigil.