The mother of a Queensland man who has been missing for nine months has made a desperate public plea for information on her son.
Leanne Pullen and husband Gary fronted media at a Mackay police station in central Queensland on Thursday in a last-ditch bid for clues as to what happened to 34-year-old Timothy Pullen.
He was last seen in the city's north on April 13 and police suspect he has been murdered.
In September they announced they had found a significant amount of Mr Pullen's blood in the rear seat of a blue Nissan Navara they had seized.
Mrs Pullen read from a prepared statement and urged anyone with information, "however insignificant", to contact Mackay police or Crimestoppers.
"As a mum I naturally live in hope that one day Tim is going to make contact with us but realistically I probably know that that is not going to happen," she said.
"The hardest thing to deal with is the not knowing.
"For our family's sake we need closure, and for Tim's sake, if the outcome is the worst scenario, we need to be able to lay him to rest in a respectful manner."
Detective Acting Senior Sergeant Jon Kent told AAP that police had received some "credible" lines of inquiry in recent weeks and the suspected homicide investigation was continuing.
The detective said he hoped Mrs Pullen's plea might prompt someone to come forward.