Former Kaukauna Teacher Convicted of Child Sex Crimes

Collin Killoren pleaded guilty to 17 felony counts of crimes against children.

Published on Feb. 12, 2026

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Collin Killoren, a former 7-12 grade teacher at St. Ignatius Catholic School and Chesterton Academy in Kaukauna, Wisconsin, was convicted of 17 felony counts of crimes against children on Thursday. The charges included several counts of child sexual exploitation and possession of child pornography.

Why it matters

This case highlights the ongoing issue of child sexual abuse and exploitation, particularly involving individuals in positions of trust like teachers. It raises concerns about the need for stronger safeguards and background checks in schools to protect vulnerable students.

The details

Killoren was first charged in April of last year with 14 felony counts of sex crimes against children. An additional 16 felony counts were later added to the case. The investigation originated from an online tip received through the National Center for Missing and Exploited Children (NCMEC), which led police to obtain records from the social media app KIK where Killoren had approached users, identifying himself as a "horny high school teacher" and offering to chat or roleplay.

  • Killoren was first charged in April of last year.
  • Additional charges were added a few months later.
  • Killoren appeared in court for a plea hearing on Thursday, February 12, 2026.
  • A sentencing hearing for Killoren is scheduled for April 16, 2026.

The players

Collin Killoren

A former 7-12 grade teacher at St. Ignatius Catholic School and Chesterton Academy in Kaukauna, Wisconsin, who was convicted of 17 felony counts of crimes against children.

National Center for Missing and Exploited Children (NCMEC)

The organization that received the online tip that led to the investigation of Killoren.

Appleton Police

The law enforcement agency that investigated the case and obtained records from the social media app KIK.

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What they’re saying

“Hey. M29 USA. Horny High school teacher. Let me know if you want to chat, dirty talk, or role play.”

— Collin Killoren (Criminal Complaint)

What’s next

A sentencing hearing for Killoren is scheduled for April 16, 2026, where the judge will determine his punishment for the 17 felony convictions.

The takeaway

This case highlights the critical need for stronger safeguards and background checks in schools to protect students from predatory teachers who abuse their positions of trust. It underscores the ongoing battle against child sexual exploitation and the importance of vigilance and reporting to authorities when suspicious activity is observed.