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Onset Investigation

Brett Robinson - President & Founder

Kostas Mavromatis - VP of Operations

Kostas Mavromatis - VP of Operations

Brett founded Onset Investigation with the vision of assisting law enforcement globally after he had uncovered evidence in over 70 cases involving wanted criminals and missing persons across Canada. He has helped close 35 cases over six years. As one of Canada’s most experienced private investigators, he regularly meets with detectives to assist with case development. He has an MA in Profiling and Analysis and an MA in Counselling Psychology.

Kostas Mavromatis - VP of Operations

Kostas Mavromatis - VP of Operations

Kostas Mavromatis - VP of Operations

Regarded as one of the premier forensic archival researchers in Canada, Kostas has spent the past four years assisting cold case squads around the country with their case development. He holds an Honours BA in History and previously served as the Senior Associate Researcher and Archivist at a charity focused on locating missing persons.


Investigation Team

Kostas Mavromatis - VP of Operations

Investigation Team

The members of our Investigation Team are unable to share their identities due to the sensitive nature of their cases. They come from backgrounds in law enforcement, fraud prevention, open-source intelligence, and academia. They are specialists in locating missing persons and wanted criminals, liaising with international police, and facilitating extradition requests.

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