The man accused of one of Queensland’s most shocking murders could be retried under proposed changes to the state’s double jeopardy laws.

Police would be able to again pursue former RAAF recruit Raymond Carroll for the alleged abduction, rape, and strangling death of Ipswich toddler Deidre Kennedy.

The 17-month-old’s body was found on the roof of a toilet block 41 years ago, about 500 metres from the family home.

Despite being twice found guilty of the murder, Mr Carroll still walks free after three successful appeals on legal technicalities, including the notion of double jeopardy.

Attorney-General Jarrod Bleijie wants to overturn the 800-year-old law which he says is a roadblock to justice.