A teacher turned drug dealer from Cardiff 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 jailed for three-and-a-half years by Cardiff Crown Court last year after being caught with around £8,000 worth of the drug.
Detectives also found 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.
– DC Timothy Jones, South Wales Police
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.
DC 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 detailing dozens of drug deals.
Kuwale had denied being a dealer when arrested and interviewed - claiming he was holding the cocaine and the other items as a "favour" for unnamed individuals.
Detective Jones said, in his experience, people in the drugs world "don't do favours".
GTCW panel chairman Steve Powell said the body had no option but to permanently ban Kuwale from teaching.
– Steve Powell, GTCW panel chairman
Mr Kuwale presents a significant and ongoing risk to the standards of the profession.
His involvement in the illegal drugs trade is evidence of deep-seated attitudinal problems.
We cannot be satisfied that there is no risk of repetition.
The proportionate sanction is an indefinite prohibition order.
The wellbeing of pupils must be protected and the reputation of the profession maintained.