Trauma-Informed Training and Its Effect on Sexual Assault Case Clearance

Estimated reading time: 7 minutes

The patrol officer is calm. Respectful. Doing their best.

But when a young woman sits across the desk trying to describe a sexual assault, the questions come out in the wrong order.

“Why did you wait to report?”
“Had you been drinking?”
“Are you sure you said no?”

Nothing intentionally cruel or intentionally malicious.

However, to the victim, it feels like disbelief. Like being put on trial. Her story comes out in fragments, her memory jumps around, and the more she struggles to explain, the more she worries she is doing it wrong.

Two weeks later, she withdraws her statement. The case is closed as “unsolved.” The officer tells themselves: This is just how these cases go.

Sexual assault cases consistently have some of the lowest clearance rates among violent crimes in policing, in large part because victims disengage early in the process. Investigators grow frustrated. Caseloads pile up. And when agencies are forced to make cuts, specialized training is often the first thing to disappear.

But what if training was the very thing keeping these cases alive?

That is exactly what a new study out of Australia set out to test.

Inside ISACURE: What Trauma-Informed Training Actually Looks Like for Sexual Assaults

ISACURE (Investigating Sexual Assault, Corroborating and Understanding Relationship Evidence) is a two-week, in-person program developed by the Queensland Police Service, designed to immerse investigators in skill development away from their regular duties. The course is capped at 20 participants and is built around active learning (not lectures) using realistic case scenarios, role-plays, brief writing, and daily reflective practice with personalized feedback.

Week 1 – Victim-survivor and trauma foundations

• Teach the Whole Story approach to shift focus from victim credibility to offender behavior
• Cover how trauma affects memory, behavior, and disclosure so officers recognize normal trauma responses
• Train narrative, trauma-informed interviewing through live role-play with external actors and facilitator feedback

Week 2 – Offender behavior and investigative strategy

• Focus on sexual offending dynamics, suspect motivation, and investigative planning when evidence is limited
• Practice suspect interviewing, case corroboration strategies, and brief preparation
• Address prosecutor expectations and investigator wellbeing to reduce burnout and compassion fatigue

The course is facilitated by a multidisciplinary team of detectives, psychologists, behavioral specialists, prosecutors, forensic physicians, and victim-support professionals. It is designed for officers who already have detective-level training and need advanced, specialist skills that translate directly into improved case outcomes.

To see a practical example of trauma-informed interviewing principles in action, this webinar highlights victim-centered approaches that align with many of the techniques emphasized in ISACURE:

This video isn’t the ISACURE course itself, but it shows the kind of trauma-informed interviewing mindset and practices that officers are developing through the two-week program.

The Study

The evaluation by Sarah Bennett, John Gilmour, Katrina Carr, Kirsten Helton, Kristi Anderson followed investigators who completed the ISACURE course and compared their case outcomes to a carefully selected matching control group of officers who did not receive the training. In total, 227 ISACURE-trained investigators were compared with 125 “matched control” investigators, meaning officers with similar demographics, roles, and sexual assault caseload profiles, so the groups were as comparable as possible before the training ever occurred.

Researchers tracked both groups for up to four years, examining what ultimately happened to their sexual offense cases. Each case was coded as solved, withdrawn by the victim, unfounded, or left unsolved, allowing the study to measure whether the training translated into real investigative differences over time.

The Impacts on Sexual Assault Clearance

For the most serious cases (rape and attempted rape) ISACURE-trained investigators didn’t just improve a little. Over time, they pulled noticeably ahead of untrained peers, showing that trauma-informed skills have lasting impact.

• Solving cases: Two years after training, ISACURE investigators solved (arrest, warrant, or notice to appear) 57.8% of rape and attempted rape cases, compared to 46.2% for the control group. By three years, the gap widened: trained officers solved 63% while the control dropped to 34%.
• Victims stayed engaged: Withdrawal rates tell the same story. At 36 months, only 14.7% of cases with ISACURE-trained investigators were withdrawn, compared to 31% for the control. Even general investigators who weren’t in specialized units cut withdrawal rates roughly in half.
• Other sexual offenses: Across other sexual offenses, ISACURE officers solved 63.3% of cases at 24 months, while untrained peers solved 47.3%. At the two year mark, ISACURE officers were three times less likely to see victims withdraw complaints.
• Arrests increased: Investigators who completed ISACURE were more likely to make an arrest. At 24 months, ISACURE officers had a 55.3% arrest rate, compared to 36.6% for control officers. Among officers with lower caseloads (20 or less cases over 2 year period), arrests were even higher for other sexual offenses, 73.7%, showing how training works best when workloads are manageable.

Secondary findings add further nuance:

• Experience amplifies impact: Officers with 11–20 years on the job benefited the most, showing the largest gains in solved cases.
• Unit assignment matters: Specialist sexual assault units consistently outperformed general units, but even general investigators saw measurable improvements with the training.
• Caseload shapes results: Lower caseloads boosted the training effect, while heavy workloads limited it.

Another striking aspect of the ISACURE results was just how long the effects lasted. Training effects usually fade after a year or two, but not here. ISACURE-trained investigators continued solving serious sexual offenses at higher rates up to four years later, while their untrained peers declined. Over that period, solved cases for trained officers increased by 7.1%, while control officers saw a 16.9% drop.

This training transforms investigations: victims stay engaged, officers act more effectively, and offenders are more likely to be held accountable.

Final Thoughts

Sex crimes are some of the hardest cases in policing, emotionally, operationally, and statistically. When officers are trained to work with trauma instead of fighting it, victims stay engaged, statements get completed, and investigations don’t fall apart early.

The difference is clear: the same victim who might have withdrawn her statement in the past now completes it. The officer listens, pauses, and asks how it felt instead of why. Cases get solved. Victims stay engaged. And these improvements don’t fade, trained investigators continue achieving better outcomes for years, across experience levels, units, and caseloads.

For additional research and practical lessons on sexual assault training, read this companion post:

Sexual Assault Training: Lessons from the Research

How 4 hours, 40 hours, and 4 weeks of sexual assault training shape investigations—and what research shows actually improves victim interviews and case outcomes.

Specialized training plays a key role in case success; reducing it can undermine investigations.

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Carlee Ruiz

Carlee Ruiz is the founder of PoliceResearchHub, a platform that turns academic research into practical insights for law enforcement. She brings seven years of experience as a crime analyst and justice researcher, with a focus on evidence based policing, gun violence prevention, and public safety strategy. Carlee currently works as a researcher at National Policing Institute, where she supports evaluations of law enforcement programs and criminal justice initiatives across the country. Through PoliceResearchHub, she aims to make research easier to understand and more useful for the people doing the work on the ground.