The mother of a Queensland toddler whose body was recovered from north of Brisbane in June has urged for justice for her infant.

Police revealed that the child suffered severe injuries from head to toe a week earlier from when he died. They said that the death of Mason Lee, the 21-month-old toddler, is being treated as a murder investigation. “It hurts so bad, that I just, I can’t understand it,” his mother Ann-Maree Lee told 7News. “He was just so beautiful. He was so gentle.”

The Child Trauma Task Force has begun working collectively with the Homicide Investigation Unit to inspect the suspicious elements of the toddler’s murder. The Queensland toddler was found dead on June 11 at Deanne Court’s house in Caboolture. Earlier reports have indicated that someone from the house called the emergency services after midnight. However, the investigators believe that Lee might have died long before his death was reported.

Based on initial post-mortem reports, detective acting inspector Ben Fadian revealed that severe injuries led to the death of the infant. “The death is unlikely the result of an accident, and we believe the injuries were deliberately inflicted and deliberately caused,” he said as quoted by the ABC.

“Mason may have been sick or injured for up to a week before he died. The signs of his injuries of illness prior to his death would have included being lethargic, vomiting, not eating his food and general unwellness.”

Fadian added that the pathological test reports are yet to arrive. According to him, almost 40 witnesses were interviewed to find the unseen details.

The detective also revealed that the Queensland toddler was taken to various shops in the Caboolture and Morayfield area in the week that he died. Fadian has requested the public to participate in the investigation. In case they have seen the toddler in any of the shops in June, they have been requested to contact the officials.

“We know Mason is part of a big family in the Caboolture area and he was known to many people and associates throughout the area through his family,” Inspector Fadian said. “At this point, we’re asking anyone who [has] information in regards to Mason, any interaction they had with his carers in this calendar year to come forward and speak with us.”