The case moved from a missing-person alert to homicide charges within a day, court officials said.
VANDALIA, Ill. — A Fayette County judge is expected to hear initial arguments this week after prosecutors charged Arnold B. Rivera, 43, with first-degree murder in the death of 14-year-old Kylie Toberman, who was found Friday in an RV behind her home.
The charges, which also include aggravated criminal sexual assault and concealing a homicidal death, follow a daylong search that began when family reported Toberman missing early Friday. Her body was discovered that afternoon on property where she had been staying, prompting a multi-agency investigation led by local police and Illinois State Police. Officials have not released a cause or manner of death. The school district called the loss “heartbreaking” and said counselors were on campus Monday as students returned to class.
According to police, Toberman was last seen late Thursday. A missing-person alert went out Friday morning with her clothing description and a request for tips. Officers canvassed the area and checked nearby structures. By about midafternoon, investigators located the teen inside an RV parked behind the residence. Detectives secured the scene, documented the vehicle and removed evidence for lab review. In a short message shared with local reporters, Toberman’s mother, Megan Zeller, confirmed her daughter’s death and said the family was overwhelmed with grief.
Rivera was taken into custody and booked into the Fayette County Jail. Prosecutors filed three felony counts, saying additional evidence would be outlined at arraignment. Officials would not discuss a possible motive, prior contacts between the parties or the results of an autopsy. Records show Rivera has previous convictions for nonhomicide offenses; authorities did not say whether any supervised release conditions were in effect. Investigators said unanswered questions include the teen’s exact movements from Thursday night into Friday morning and how she ended up inside the RV.
Vandalia Community Unit School District #203 notified families Friday evening and again on Monday, noting that state and local authorities were directing the release of information while the homicide investigation continued. The district said its crisis team would be available “in the days ahead” and asked families to be mindful of students processing the news. Coaches and classmates remembered Toberman for her work ethic on the wrestling mats and her sense of humor in class, according to recollections shared with local outlets.
Under Illinois procedure, a detention hearing is expected shortly after charging. Prosecutors can seek to hold Rivera without bond by outlining the evidence and public-safety concerns. A preliminary hearing date or grand jury review could be set within two to three weeks, depending on lab timelines and witness availability. Investigators said they are examining digital records, neighborhood video and phone data, and they expect to release additional details once autopsy findings and forensic tests come back.
On Monday morning, a small memorial of flowers and notes formed near the school’s front entrance. A counselor said staff were checking in with students one-on-one and in small groups. A neighbor who watched patrol cars come and go through the weekend said the street was quiet by Sunday night but that the sight of evidence technicians around the backyard RV “will be hard to forget,” she said.
As of Monday afternoon, Rivera remained jailed in Fayette County pending his first appearance, and authorities said the next public update would likely come after the arraignment and the release of autopsy results.
Author note: Last updated November 17, 2025.