A teacher turned drug dealer had a cocaine laboratory in his home worth around £900,000, a police officer has told a disciplinary hearing.
Father-of-two Macphallen Kuwale was handed a three-and-a-half year jail term by Cardiff Crown Court last year after being caught with around £8,000 worth of the Class A substance.
Detectives also uncovered a "sophisticated" wholesale operation - comprising of cutting agents worth hundreds of thousands of pounds as well as a pressing machine - to make the cocaine appear to be of a higher grade.
A General Teaching Council for Wales (GTCW) hearing today heard that Malawian-born Kuwale was an IT teacher at Coleg Cymunedol Y Dderwen, Bridgend, when arrested by police.
As well as his criminal conviction, Kuwale now faces being struck off the teaching register.
Detective Timothy Jones, of South Wales Police's drug squad, told a panel that 111 grammes of cocaine was seized during the raid at Kuwale's home in Llanrumney, Cardiff.
He said: "Kuwale was heavily involved in the supply of cocaine.
"He was involved in street level dealing as well as a sophisticated wholesale operation.
"It was totally unusual. It is not something that you come across everyday."
Detective Jones said other drug paraphernalia was found at Kuwale's home after the search warrant was executed on December 13, 2012.
And officers also seized his mobile phone, with coded text messages speaking about dozens of drug deals.
When arrested and interviewed, Kuwale had denied being a dealer - claiming he was holding the cocaine and the other items as a "favour" for unnamed individual.
Detective Jones, who has worked on hundreds of narcotics cases during his 11 year police career, said in his experience people in the drugs world "don't do favours".