A business and economics teacher who repeatedly refused to disclose his address and several aliases to the Criminal Records Bureau has been suspended from the profession.
Kulvinder Singh Sahota, who taught at John Kelly technology college in Neasden, north-west London, spent more than five years dodging the authorities, failing to tell his employers where he was living.
When Sandy Young, the college principal, told him he would face a disciplinary hearing over his behaviour, Mr Sahota lunged for him and launched a torrent of abuse at his boss, England's General Teaching Council heard.
Mr Sahota, who had worked at the college since 1993, gave different addresses when applying for promotion at the school or for general communication.
He claimed to be living at one address while using another as a postal address.
The school tried several times to contact Mr Sahota during a long illness, using an address they had on record for him. He later claimed he had been staying with his parents in Telford, Shropshire.
When it emerged Mr Sahota was using pseudonyms for hospital appointments, Mr Young was advised to ask him to undergo a new CRB check.
He refused several times and when he finally went through the check he did not disclose an address where he was listed at Companies House as a director. He said he used only the aliases "Singh" and "John".
"I thought this was strange, as he had previously said he used so many that he could not remember them all," said Mr Young.
He decided Mr Sahota should face a disciplinary hearing, and told him so at an informal meeting in February 2004.
Mr Young said: "He became very angry and abusive to me. He exited my office but two or three minutes later he came back and lunged for my notes, which were on my desk. He called me a drunken fool and accused me of being intoxicated."
The police were called, and the teacher was suspended.
Mr Sahota, whose current address was given as Quernmore Road, Finsbury Park, north London, did not attend the GTC hearing, although he had been sent letters of notification. The hearing was told he had an excellent reputation as a teacher, had been head of Years 10 and 11 until his long-term illness and had set up the student council.
Mr Sahota was found guilty of unacceptable professional conduct and suspended for six months.
Peter Cooper, chairman, said: "Being truthful to the CRB is absolutely central to the protection of children."
Mr Sahota must complete a CRB disclosure application and provide the GTC's registrar with his full address before returning to work as a teacher.