Annie Kasprzak was 15 when she was babysitting her brothers at her Riverton, Utah home while her mother Veronica and stepfather James went out for dinner. When they returned home everything seemed fine — until they found a note tucked in Annie’s bed. It said she had run away to California. “Please don’t try to look for me because I don’t want to be found,” she wrote. In the note, she also wrote that she had lied and told her friends that she was pregnant. (Earlier, she told her parents she had sex for the first time. Her pregnancy test came back negative, and Annie was put on the pill.)
Annie’s body was eventually found, beaten and dumped in the nearby Jordan River. Kasprzak’s 14-year-old boyfriend, Darwin Christopher Bagshaw, was a suspect. Two years later, in 2014, Bagshaw was charged with first-degree felony murder and second-degree felony obstruction of justice (he lied to the police before Annie’s blood was found on his shoes). When Bagshaw turned 18, he was tried as an adult. Bagshaw made a plea; he faces a mandatory 15 years to life in prison. Dateline NBC will air its investigative report on May 6 at 10pm.