CUSTOMS officers today appealed for help in tracking down a wanted man.
They are desperately trying to find Mahfooz Ahmed, a man they want to question over a huge drugs operation.
Ahmed, 29, disappeared exactly a year ago today and has not been found - despite inquiries across the UK and abroad.
Investigators believe he may be linked to a drugs operation which saw officers seize a huge quantity of Class A drugs, including nearly 30 kilograms of heroin worth tens of thousands of pounds.
It has also been revealed that Ahmed - who may well be using a different name - was involved in a project looking at drugs problems in Calderdale.
He was the author of a report in July, 2002 - commissioned at a cost of £92,000 by the Government's Health Department - into drug problems affecting Asian communities.
Ahmed was last seen on March 20 last year in Hopwood Lane, Halifax.
He has close links with Halifax, but is also known to have connections with several other parts of the county, including Huddersfield and Bradford.
A Customs spokesman said: "We would like to speak to Mr Ahmed in connection with an incident in Hopwood Lane.
"He is believed to be still in the West Yorkshire or Lancashire area.
"We would urge anyone with information to come forward at once.
"They can contact Revenue and Customs staff directly on 0870 785 4100 during office hours or speak to one of our officers in complete confidence on our helpline on 0800 595 000, which is open 24 hours a day."