The mother of missing RAF airman Corrie McKeague says there's still no trace of him at a landfill site in Cambridgeshire.
Corrie disappeared on a night out in Bury St Edmunds in September last year.
The search for the 23-year-old restarted nearly one month ago in Milton.
Officers say they've still not found any rubbish from the time Corrie disappeared. A bulldozer has now been bought in to speed up the search.
On Facebook Nicola Urquhart said: "They are also now bringing in a bulldozer to move the searched rubbish, again I have been assured that this will have no negative impact on the quality of the searching but speed the process up."
"For this I am incredibly grateful as it is not easy waiting each day for a possible call. They have still not found any rubbish from the time Corrie disappeared it is still earlier dates up to the 18th of September."
Suffolk Police said Corrie's disappearance will now be treated as a cold case as police say there are no "realistic lines of enquiry left".
Suffolk Police said Corrie's disappearance will now be treated as a cold case as there are no "realistic lines of enquiry left to pursue".
Suffolk Police are passing the investigation into the missing airman Corrie McKeague onto a cold case team.