Queensland Police have launched a renewed appeal for information into the decades-old murder of Bowen woman Dianne Mary Angwin, announcing a $500,000 reward in the hope of finally solving the cold case.

Dianne Angwin, a 50-year-old mother of four and Meals on Wheels volunteer, was fatally stabbed inside her Bowen home on Leichhardt Street during the early hours of 2 December 1997. Despite a major investigation at the time, no person has been charged over her death.

Police said a recent review of the case uncovered new information that has led detectives to revisit previous evidence, speak with witnesses again and explore new investigative opportunities. The review has identified potential leads that were not fully known during the original investigation.

At the time of the murder, Dianne was living in Bowen with her friend Edith Lay. Police investigations found that an intruder entered the unit during the night, and Dianne was fatally injured during the incident. She was taken to Bowen Hospital but could not be saved.

Police believe there may still be people in the Bowen community who have information about what happened that night. Investigators have encouraged anyone with knowledge of the case, even if they believe the information may seem insignificant, to come forward.

The cold case investigation has included further examination of evidence, additional forensic testing and renewed discussions with people connected to the original inquiry. Police are also reviewing information about people who may have had knowledge of events surrounding Dianne’s death.

Detectives have highlighted that the reward is available for information that leads to the apprehension and conviction of the person or people responsible for the murder. Police have also indicated that indemnity from prosecution may be considered for an accomplice who did not commit the murder and provides significant information.

Dianne’s family has continued to seek answers for almost three decades. Her daughter and granddaughter have spoken about the lasting impact of losing a loved one without knowing the full circumstances of her death. They have urged anyone with information to contact police and help bring closure to the family.

The case highlights the ongoing work of Queensland’s Cold Case Investigation Team, which continues to review unsolved serious crimes using modern forensic techniques and new information that may not have been available during earlier investigations.

Police have established that information from members of the public could be critical in progressing the investigation. Investigators believe someone in the community may hold details that could help identify the person responsible.

The renewed appeal demonstrates that even after many years, police continue to pursue answers for victims and their families. Authorities are encouraging anyone who knows something about Dianne Angwin’s murder to come forward and assist with the investigation.