Police are appealing for residents to avoid approaching a man wanted in the Oxford region and to contact emergency services immediately.
Martin Gray is wanted after breaching terms attached to his Serious Crime Prevention Order, Thames Valley Police confirmed.
He measures roughly six feet in height, has a solid build, brown irises, and short dark hair.
The 43-year-old frequents Oxford and drives a black Volvo XC40.
Detective Constable Ball, the officer leading the inquiry, said officers are working to locate Martin Gray and urged members of the public to stay away and dial 999 if they see him.
Anyone with details about his whereabouts can ring 101 or report through the force website, quoting reference 43260117864.
Those wishing to remain anonymous can contact Crimestoppers on 0800 555 111.
Gray directed a county-based smuggling network that imported and distributed large amounts of cocaine alongside other Class A narcotics.
He was handed an 18-year custodial term at Oxford Crown Court in 2015.
His extensive operation, worth several million pounds, operated with nine associates and employed hydraulic machinery to press drugs into compact blocks, illustrating the scope of the enterprise.
During Operation Strix, officers from Thames Valley Police positioned covert monitoring equipment and audio devices, leading to the confiscation of roughly 15 kilograms of cocaine and 7 kilograms of heroin, with a potential street value approaching £24 million.
Seized assets comprised £46,000 in banknotes, three gemstones worth £3,740, and a pair of watches valued at £11,000.
