Alexi Morgan, 30, from West Bromwich, was a high-ranking member of a Midlands-based drugs supply network.
He was found guilty in his absence and sentenced to 15 years and six months’ imprisonment on April 23.
A manhunt is now underway to find Morgan and bring him to justice.
Morgan was prosecuted as part of the National Crime Agency’s Operation Venetic, which targets encrypted communications platform EncroChat.
NCA investigators identified Morgan’s ‘Denzelboss’ handle on the platform.
He interacted with other organised crime group members on EncroChat to deal kilos of cocaine and heroin.
His associates included Birmingham pair Danyal Aziz, 30, and Michael Earp, 34, who were jailed for a combined 59 years in 2023 for supplying Class A drugs and sourcing firearms.
NCA investigators painstakingly sifted through thousands of EncroChat messages sent amongst the criminal network.
Messages laid bare Morgan’s role in supplying cocaine and heroin across the West Midlands.
In one example, on April 4, 2020, he organised the exchange of five kilos of cocaine and £188,000 in cash outside a primary school in Walsall.
From EncroChat evidence alone, Morgan was found to have peddled 27 kilos of Class A drugs across the midlands region with a wholesale value of more than £800,000.
Rick Mackenzie, NCA senior investigating officer, said: “Alexi Morgan played a key role in a high harm organised crime group supplying deadly drugs across the Midlands.
“Our work to locate him and return him to custody to serve his sentence is ongoing.
“We know he has links to the West Midlands and Greater London, and are appealing for any information relating to his whereabouts that may assist our investigation.
“Anyone with information is urged to contact Crimestoppers anonymously on 0800 555 111.”