The ISN Investigative Interviewing System, course information and registration
Investigative InterviewingThe ISN Investigative Interviewing courses come in a variety of modules from a 1 day to a 3 day advanced course. ISN will assist you with selecting the right course for you or we will customize to suit the specific needs of our clients.
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Our Team
The ISN team is led by Dave Perry who has 27 years of police experience retiring as one of the most recognizable and successful investigators in the Toronto Police Service. In his distinguished career he has worked on some of the largest and most sensitive investigations in the country. He has been called on to speak and make presentations in a variety of forums including international conferences.Learn More >>
Testimonials
When our 14yr old son went missing in February 2008 it was a very traumatic time for all of us. We were emotionally and physically exhausted searching for him, we felt frustrated and helpless not knowing what to do. The Missing Children Society referred us to Investigative Solutions Network...Learn More >>
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Testimonials
"I recently had the chance to take your Investigative Interviewing Course and wanted to send you some feed back. I am working in a law enforcement field where I am required to interview and de-brief victims, witnesses, suspects and accused parties on a regular basis.
Your course was both informative and interactive on the topics covered, it taught me interview skills that I was able to apply immediately to my job. I have done several intense interviews since I took the ISN course and have noticed my confidence and skills increase as I applied the theories taught. During one lengthy interview I had an accused party confess, many other interviews were successful as I was able to indentify signs of deception and keep the investigation focused, I was able to gain valuable information in a more efficient manner than I was able to do before the training. These positive results are all directly attributed to the training I received.
My interview skills were moderate before the ISN training, I truly feel I have gained invaluable knowledge from your course that has made me a much more skilled and advanced interviewer. I have applied your techniques and have seen the positive results first hand, Thank you."
~ Mike O'Connor
"If you ever wanted to bolster your resume for Toronto 's special squads or perhaps for some other police service, The ISN Interview Course will show that you have the knowledge, skills and drive that make the distinction between good cops and great cops. I highly recommend this course. I truly felt privileged to be on this course.
The ISN course is well put together with concise information that comes directly from the nations leading Homicide and Sexual Assault Investigators. Real investigations are examined and as students we had opportunity to practice the new skills past down to us in front of these investigators for their critiques.
The methods taught here can be utilized in every aspect of police work. As a traffic officer, I conduct approximately two interviews per day. Even in the simplest of interviews the skills learned are put to use. As a Primary Response Officer, in the past I have conducted simple interviews of people at the scene. Later the information obtained has assisted the lead investigators in building a case to charge and later convict these same people I spoke to. When I was in the Sexual Assault/Child Abuse Office a good interview meant the difference between, Conviction of serious Criminal charges in a high court Judge and Jury trial, to not laying charges at all do to a lack of evidence. Interviewing will be The Most Important skill you will ever use as a police professional!" ~ Todd Parker
"When our 14yr old son went missing in February 2008 it was a very traumatic time for all of us. We were emotionally and physically exhausted searching for him, we felt frustrated and helpless not knowing what to do. The Missing Children Society referred us to Investigative Solutions Network, and when we met with Dave Perry from ISN, my husband and I immediately had confidence in him. His concern was genuine and he spoke honestly. As soon as the investigators from ISN began working with us a huge weight was lifted. As former police officers, their experience, knowledge, and resources were impressive and that is exactly what we needed to move forward. Our son was located in another city 6 hours away from our home and the investigators from ISN made sure we were reunited and brought him home successfully. Thank-you Dave Perry and Ron Wretham for being so dedicated in finding our son. Sincerely and forever grateful" ~ Linda Toner
"Dave Perry has supported the work of Child Find Ontario for close to 20 years. He has assisted in the training of our volunteers and staff and most importantly, he has been an advocate and a voice for missing children and their families. As the president of Investigative Solutions Network, a private investigation, training and consulting firm, he continues to assist families who have missing loved ones. Dave and his associates at ISN are all former police officers with tremendous backgrounds in the investigative field, including locating missing people. I highly recommend the services of ISN and thank Dave and his team for all they do." ~ Trish Derby, Executive Director, Child Find Ontario
Scholarship Winner
"My experience at Durham College has been extremely positive. I'd like to take this opportunity to thank Detective Sergeant Dave Perry
for his ability to inspire and motive his students; he truly is an exemplary instructor and mentor. I hope that by receiving this
scholarship my five children will be inspired to follow in my footsteps."
~ Vincent Wilson, Police Foundations Diploma Program
No matter what your problem or need ISN will find a solution that will work for you using
the best people, the best methods,
achieving the best results.





