Wednesday, October 6, 1999 Published at 13:33 GMT 14:33 UK
Murder charge man denies 'obsession'
Dr Francisco was found with a vacuum cleaner cord around her neck
The man accused of murdering doctor Joan Francisco has denied being obsessed with her.
Anthony Diedrick, 39, told an Old Bailey jury that although he had secretly listened at the gynaecologist's bedroom window at night, talked to friends about her and tried to contact her through his mother, it was not an obsession.
"I did not set out to do it," he said. "I can't explain why I did it."
The doctor's body was discovered on Boxing Day 1994 - six years after a relationship between she and Mr Diedrick had ended.
His DNA was found in three tiny specks of blood on the dark pink T-shirt Dr Francisco was wearing.
The prosecution alleges Mr Diedrick became obsessed with Dr Francisco, 27, after they broke up and rekindled his obsession a few months before her death.
He is alleged to have killed her when he confronted her as she prepared to leave for the USA.
"It must be because I did not murder Joan," he said. "I could not murder Joan."
Mr Sweeney asked: "Are we to take it that this much-washed T-shirt somehow remained with your DNA over six years?"
Mr Diedrick replied: "There must be an explanation."
Earlier, he admitted smashing into Dr Francisco's family home in Acton, west London, in February 1989, through patio doors and threatening to kill her new boyfriend.
The case continues.