Gladstone police have faced questions in court over delays in providing evidence connected with an alleged $3 million drug-trafficking operation. Three accused people — Kain William Granzien, Brent William Granzien and Tina Louise Granzien — are facing charges arising from the major investigation.

The matter was raised in Gladstone Magistrates Court today, where lawyers expressed concerns that important parts of the prosecution's brief of evidence had not yet been provided to the defence. Some of the material had reportedly been referred to during earlier bail proceedings but remained outstanding.

The prosecution acknowledged that the delays were unacceptable. The court subsequently ordered the arresting officer to provide a sworn statement explaining why telecommunications evidence and other material had not been supplied within the expected timeframe.

The alleged drug operation is one of the largest investigations reported in the Gladstone region this year. Earlier police investigations resulted in 25 people being charged with 235 offences, with authorities alleging that more than 7.5 kilograms of methylamphetamine and cocaine, along with more than 160 kilograms of cannabis, were seized. Police estimated the drugs at a combined value of about $3 million.

Police also reported the seizure of more than $1 million in cash, together with vehicles and other assets allegedly connected to criminal activity. Investigators have continued examining the alleged network and the source and distribution of the drugs.

In the current court proceedings, Kain and Brent Granzien remain in custody, while Tina Granzien is on bail. The court has directed that outstanding evidence be provided by September 7, with the matter adjourned until September 8.

The evidence delay is significant because defendants must have access to relevant prosecution material to properly prepare their cases. Court proceedings can be delayed when evidence is still being gathered, processed or disclosed.

The case remains before the courts and the allegations against the accused have not been proven. Each accused person is entitled to the presumption of innocence unless guilt is established through the legal process.

The investigation and prosecution are expected to continue, with the next court hearing likely to provide further information about the outstanding evidence and the progress of the case.