Through a critical discourse lens, a review of formal police documents detailing historical contact with the perpetrator of Canada’s worst mass casualty event aims to demonstrate that the perpetrator’s Whiteness and socio-economic status deemed him benign and thus invisible to law enforcement officials during the early stages of the mass casualty investigation. This exploration contributes to a broader racialized analysis of who is deemed suspicious or harmless within the context of policing. By contrasting the experiences of Black Nova Scotians with the police to those of the perpetrator, this case study will demonstrate how institutional procedures and processes, influenced by biases, not only produce and maintain racial disparities within the criminal justice system, but also negatively impact law enforcement officials’ ability to conduct fair and thorough criminal investigations, ultimately impeding public safety. The impact on police legitimacy is also discussed.