An animal welfare campaigner is demanding more prompt action over a senior constable under investigation for the shooting deaths of more than 20 kangaroos.
The officer was issued with an infringement notice for his part in the incident at a property at Booral, near Hervey Bay, in December last year.
He could still face disciplinary action depending on the outcome of an internal Queensland Police Service investigation.
Australian Society for Kangaroos president Nikki Sutterby says it was disappointing that the investigation into the 42-year-old north coast region officer has taken so long.
'Justice needs to be done here if you want to send a message to the community that this behaviour is unacceptable,' she told AAP.
A police spokesman said it would be inappropriate to comment on the matter given it was still under investigation.
Horse riders stumbled upon the kangaroo carcasses and alerted authorities. Some joeys were shot at point-blank range, and only one of the three young that survived the shooting could be saved. Kangaroos are protected animals and it is an offence to kill one without a permit, with fines reaching up to $10,000 per roo.
A 16-year-old boy involved in the shootings has been dealt with under the Youth Justice Act.
Comment from the Queensland Police Union has been sought.