A body found below a man's garage floor is believed to be Jill Kloppenburg, a missing Massachusetts woman who vanished last year, authorities said. Kloppenburg, 47, was last seen leaving her home in Lowell - where she was temporarily living with roommates - on January 2, 2025, according to the FBI. She was later reported missing on February 26, 2025. She "has not been seen or heard from since," the FBI said in an alert on her disappearance.