A stalker who terrorised a psychiatrist and his fiancee for a year was warned yesterday she may face a long jail sentence.

Maria Marchese (45) hounded Dr Jan Falkowski, aged 45, with sick text messages, emails and phone messages. She also claimed to have put a bomb on a powerboat he was due to race, London's Southwark Crown Court heard.

Marchese of Bow, East London, bombarded Dr Falkowski's then fiancee Deborah Pemberton with abusive calls and death threats by text, including one warning she would be "burnt down in her wedding dress" if she dared marry the psychiatrist.

Other warnings said "Dig your own grave" and "Your life will end, gunman paid". She also sent messages declaring undying love for the doctor.

Argentinian-born Marchese was found guilty of three counts of harassment, charges of threatening to kill and perverting the course of justice.

Marchese threatened to kill Ms Pemberton and falsely accused Dr Falkowski of rape.

She falsified evidence by picking one of his used condoms out of a bin to back her rape claim, the court heard.

Judge John Price told her: "You have gone to the most extraordinary lengths of accusing him of rape and if it was not for experts who established the DNA found was from him and his girlfriend, that could have left him a prison sentence."

Sentencing was adjourned to September 22 pending psychiatric reports.

In a statement, Dr Falkowski spoke of relief his "four-year nightmare" was over.

But while "justice" had been done, he said he had been the victim of numerous failures in the legal system.

Dr Falkowski called for anonymity in rape cases to extend to the accused until trial to prevent a repeat of the "immeasurable" damage done as a result of Marchese's allegations. He was charged with rape in 2004 but cleared in 2005 - a "crime" he described as "complete fabrication".