Nottinghamshire Police Chief Constable Kate Meynell in an interview after allegations and action over police viewing footage after the Nottingham Attacks.
Another staff member is set to face misconduct proceedings, with eight others who had “low-level access” receiving “standards interventions”.
Two police officers were also disciplined over a WhatsApp message, described as “crude and distasteful”.
The force is already being investigated by the IOPC, along with Leicestershire Police, following the case, which saw Calocane given a hospital order after admitting manslaughter on the grounds of diminished responsibility.