Tiahleigh Palmer's foster brother has reportedly been targeted in prison by other inmates.
Trent Thorburn, who is 19 years old, is being held in jail on charges of incest, perjury and perverting the course of justice following the murder of his 12-year-old foster sister.
The Courier Mail reports that Thorburn has been bashed in two separate incidents over the past few days, after prisoners encouraged each other to target him. The incidents resulted in minor injuries.
Thorburn was recently denied bail at Beenleigh Magistrates Court last week. It was alleged that he had incestuous sex with his foster sister and that he feared she was pregnant before her murder last year.
Tiahleigh's foster father Rick Thorburn has been charged with murder and will face court in December. He has recently woken up from an induced coma and has been imprisoned.
Tiahleigh lived with the family for 10 months before her murder, and her body was found a week after she went missing, on November 6.