Queensland Premier Annastacia Palaszczuk says the state may appeal  the suspended sentence of a man who laughed after pleading guilty to the manslaughter of his four-year-old stepson.

Ms Palaszczuk said the reaction of Matthew Ian Scown upon his release from custody on Wednesday was “completely insensitive”.

“I’m quite sure the Attorney-General will absolutely be looking at this case,” Ms Palaszczuk told Channel Nine on Thursday.

Asked to respond to community anger expressed at Scown’s response, she said: “I’m angry too. How insensitive for this man to be laughing after the death of his stepson.”

“Absolutely unacceptable and I think everybody is feeling it today.”

.@AnnastaciaMP speaks about the outrage after Michael Scown walked free from a QLD court grinning. #9Today pic.twitter.com/GNb2Tq21pb

— The Today Show (@TheTodayShow) October 11, 2017

“How insensitive is that for the man to be laughing after the death of his stepson, it’s absolutely unacceptable,”Ms Palaszczuk said.

“I understand that his partner is due to face court shortly, and I hope that she feels the full force of the law.”

After pleading guilty Wednesday in Brisbane’s Supreme Court to the manslaughter of Tyrell Cobb, Scown was sentenced to four years in prison.

Because he had already spent two years and eight months in custody, the remainder of his sentence was suspended and he walked free.

Scown is the former de facto partner of Tyrell’s mother, Heidi Strbak, who is also charged with manslaughter.

Tyrell was found unconscious inside an apartment at Biggera Waters on the Gold Coast in 2009 and later died in hospital.

The court heard Tyrell died from an abdominal injury.

Prosecutor Phil McCarthy told the court Scown called triple-0 when Tyrell began vomiting after he was put to bed by his mother and told the operator “it looks like he’s going to die”.

“He never regained consciousness,” he told the court.

“[There was] … a total of 53 bruises and 17 abrasions.”

Tyrell died in hospital in 2009. Photo: ABC

In sentencing yesterday, Justice Martin Burns said he acknowledged that Scown had asked Ms Strbak to seek medical attention for Tyrell the day he died.

“Clearly you were very worried about the little boy,” he said.

“You ought to have acted yourself, regardless of her wishes.”

Ms Palaszczuk said the judge “obviously made the decision based on the evidence”.

“I’m quite sure the Attorney-General will be looking at this case,” she said.

– With ABC