A 38-year-old Queensland Police senior constable has been charged with murder over the death of his baby son.

Police charged the man after a joint investigation by the child trauma taskforce within the child safety and sexual crime group, state crime command and the ethical standards command.

The investigation related to the death of a two-month-old boy at a property in Victoria Point on Brisbane's bayside on June 28, 2014.

The officer from the Brisbane region, who had already been suspended from duty with the Queensland Police Service, is due to appear in the Brisbane Magistrates Court on Monday.

At a media conference on Saturday afternoon, Deputy Commissioner Steve Gollschewski said he could not release too many details about the case but confirmed "there were fairly significant injuries to the baby".

He said the officer involved was suspended about a month after the child's death and defended the decision by investigators not to speak publicly on the officer's alleged involvement before Saturday.

"Our community needs to have confidence, in fact great confidence, that no matter who is responsible for these types of crimes, that its police service will be relentless and committed in ensuring that the investigations are brought to conclusion and that the offenders are brought to justice," he said.

"Now this is a very tragic event, with the loss of a young, innocent life and the devastation of a family.

"I'm a father — these sorts of crimes, irrespective of who commits them, are tragic and terrible.

"I can only say that we are committed, as we have been in this instance, to making sure the offender is brought to justice.

"Particularly in this one, we've [been] very careful, hence our involvement with the Crime and Corruption Commission to make sure everything has been done properly."

Detective Superintendent Cheryl Scanlon said they would have kept the investigation away from public attention regardless of who was involved.

"In terms of any sort of infant homicide, they aren't necessarily made known to the media," she said.

"It doesn't matter whether there's a police officer charged or a member of the community.

"They are extremely difficult, complex and protracted investigations where you have expert evidence involved and they take many, many months to resolve."

Deputy Commissioner Gollschewski said the officer was suspended on full pay but now that he had been charged this would be reviewed.