Shocking new evidentiary documents revealed in Madeline Soto case. OSCEOLA COUNTY, Fla. - New documents in the case against Stephan Sterns, the man accused of killing 13-year-old Madeline Soto, detail what potential evidence law enforcement and detectives have gathered during their investigation. Recently, the state responded to the defense's motion for "demand of discovery," which sought to see what documents, items, phone records, and other elements the state has in its possession before a possible trial.