POLICE raids on Warwick properties allegedly linked to a 40-year-old triple murder cold case have shocked many Southern Downs residents, including Mayor Peter Blundell.

Cold case detectives remain in Warwick investigating the suspected murders of Barbara McCulkin and her two daughters Vicki and Leanne, who disappeared from their Brisbane home in January 1974.

They have not been seen since.

Cr Blundell said the investigation, along with the recent death of 18-year-old Jazmyn Carter from meningococcal, had put the media spotlight on Warwick.

He admitted it was disappointing to see the Rose City making national headlines for such incidents.

But Cr Blundell was adamant they were isolated and that Warwick remained a "friendly and safe community".

"In discussions I've had with police from the local area, it is clear we are certainly still a very safe community," he said.

"It's for that reason, when incidents such as these occur, they are all the more noticeable."

The ongoing police investigation based on the Southern Downs centres on Warwick man and former Brisbane underworld figure Vincent O'Dempsey, his associates and properties he owns.

Police seized cash, marijuana and weapons from one of those properties during raids last week.

A 66-year-old man, a known associate of Mr O'Dempsey, has since been charged with drug, drug trafficking and weapon related offences.

Queensland Police confirmed that cold case detectives remained in Warwick, but would not elaborate on the investigation.

Police said the drug busts had made the operation a success, but would not comment on claims evidence into the cold case had been found.

"In terms of rating the success of the Warwick based raids, given the seizure of over $570, 000 in cash and over 50 kilograms of cannabis, it is safe to say that we have made significant progress in dismantling a drug production and trafficking network operating out of Warwick," a police spokeswoman said.

Cr Blundell said he hoped there were some positives to come out of the cold case raids.

"At the end of the day, if police can provide some closure (for the family and friends of the McCulkins) than it will be a good thing," he said.