From the State’s Attorney:
CYBERTIP LEADS TO ARREST AND DETENTION OF REGISTERED SEX OFFENDER ON NEW CHILD SEXUAL ABUSE MATERIAL CHARGES
McHenry County State’s Attorney Randi L. Freese announces that the Honorable Judge Cynthia D. Lamb granted the State’s petition to deny pretrial release for Robert E. Thornton, 57, of Island Lake, Illinois, following his arrest on t
- three counts of Possession of Child Sex Abuse Material, class 2 felonies, and
- one count of Failure to Register as a Sex Offe- nder, a class 3 felony.
Evidence presented at the detention hearing established that on November 7, 2025, the National Center for Missing and Exploited Children (NCMEC) received a CyberTip after Snapchat reported that an account believed to belong to an individual residing in Island Lake, Illinois, had uploaded files suspected to contain child sexual abuse material (CSAM).
The CyberTip was forwarded to the Island Lake Police Department for investigation.
Through the execution of multiple search warrants, detectives obtained records from electronic service providers, including the IP and email addresses associated with the Snapchat account and the reported file uploads.
Investigators determined that the IP address was assigned to a residence in Island Lake where Thornton resided.
The investigation further revealed that the Snapchat account and associated email address identified by the electronic service provider and provided to NCMEC belonged to Thornton.
Detectives also learned that Thornton had failed to register either the Snapchat account or the associated email address as required under the Illinois Sex Offender Registration Act.
Detectives seized eighteen items for further forensic analysis.
Thornton is a convicted sex offender with prior convictions for Indecent Solicitation of a Child in Cook County in 2001 and Possession of Child Sexual Abuse Material in Kendall County in 2008.
As a registered sex offender, Thornton was legally required to report all internet identifiers and electronic communication accounts to law enforcement.
Investigators allege he failed to do so.
Based upon the evidence presented and the nature of the allegations, the Court found Thornton posed a real and present threat to the safety of the community and ordered that he remain detained pending trial.
State’s Attorney Freese commended NCMEC, the Island Lake Police Department, and all investigators involved in the case for their diligent work.
“You cannot hide behind a computer anymore.
“Every upload, every account, every digital footprint leaves evidence.
“Advances in technology, combined with outstanding investigative work by our law enforcement partners, make it increasingly difficult for offenders to escape detection. “
“Those who continue to exploit children online should know we will find them, prosecute them, and seek to protect our community from them.”
Thornton’s next court date is set for August 18, 2026, in Courtroom 302.
Members of the public are reminded that a criminal complaint contains only charges and is not proof of the defendant’s guilt. A defendant is presumed innocent unless and until proven guilty beyond a reasonable doubt in a court of law.
