MONTGOMERY COUNTY, Texas A 17-year-old was indicted Thursday by a Montgomery County grand jury on 16 charges ranging from aggravated sexual assault of a child to possession of child pornography.

Llewellyn Van Sligtenhorst has been charged with six counts of aggravated sexual assault of a child, two counts of promotion of child pornography, two of sexual performance of a child and six counts of possession of child pornography from Dec.24, 2012 to Jan. 16, 2013.

Vansligtenhorst remains in the Montgomery County Jail and is also facing charges for which he has not yet been indicted on.

On Oct. 29, Judge Kathleen Hamilton waived exclusive jurisdiction over the case against Vansligtenhorst, who will be prosecuted as an adult.

The charges against Vansligtenhorst alleged to have been committed against a 6-year-old victim when Van Sligtenhorst was 16 years old.

The investigation began in 2012 when the National Center for Missing and Exploited Children forwarded a cybertip to the U.S. Department of Homeland Security Investigations Unit concerning the interstate transmission of child pornography.

The source of that material was determined to be a home in Harris County, but the information was too old to support a search warrant.

When DHS became aware of a second transmission in April from that same location in the 5000 block of Mossy Bridge in Spring, federal agents and deputies with the Harris County Precinct 4 Constable s Office executed a search warrant and recovered approximately 4,000 images from Van Sligtenhorst s electronic devices. More than 200 of these images involved this 6-year-old victim.

After investigators determined that the offenses had occurred at a second home in Montgomery County, additional search warrants were executed at both the Harris and Montgomery county homes in May.

Police were able to locate almost all of the evidentiary items set forth in the search warrants. Llewellyn Van Sligtenhorst was taken into custody the following day, and remained in the Montgomery County juvenile detention center until his certification as an adult.

County Attorney J.D. Lambright stated that this case is likely the most egregious case involving a juvenile offender committing such despicable sex acts on another juvenile in the history of our county.

His total bond has been set at $500,000.

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