Overview
- Illinois State Police are leading a multi‑agency investigation with assistance from local sheriff’s offices, the FBI and county coroners, authorities said.
- Arnold B. Rivera, 43, was arraigned Monday and is being held pending trial on charges of first-degree murder, aggravated criminal sexual assault and concealing a homicidal death.
- Kylie Toberman, 14, was reported missing early Friday and found that afternoon in an RV behind the Vandalia residence where she lived, according to officials and family.
- The Fayette County Coroner has not released the manner or cause of death pending further investigation, officials said.
- Court records cited in multiple reports show Rivera has prior cases dating to 2000, including a plea that followed the dismissal of earlier charges and a 2008 conviction for possessing a stolen vehicle.