The husband of slain Brisbane mother Allison Baden-Clay has had his Toyota Prado returned to him by police.

Gerard Baden-Clay was seen driving the vehicle from his Century 21 real estate agency yesterday but did not answer questions by the Courier Mail about what caused the damage to the front right bumper.

Forensic tests were conducted on the vehicle, the family's other car - a silver Holden Captiva and Mrs Baden-Clay's body after it was discovered on a creek bed 10 days after she was reported missing.

Police are yet to reveal the cause of death or respond to a Seven News report they had been interviewing people south of the Queensland border.

Anyone with information on this case should call Crimestoppers on 1800 333 000.

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