A man filmed his girlfriend as she died over a period of hours after he had given her Class A drugs, a court has heard.
Louella Fletcher-Michie, 24, the daughter of Holby City actor John Michie, was found dead in woods on the Bestival site in Dorset in 2017.
Ceon Broughton, 29, denies her manslaughter and supplying drugs.
His trial at Winchester Crown Court heard he told her concerned family she was being a "drama queen".
Jurors heard Mr Broughton filmed Ms Fletcher-Michie while she was "disturbed, agitated and seriously ill".
William Mousley QC, prosecuting, told the court the defendant had given his girlfriend the Class A drug 2CP while they attended the Bestival event in the grounds of Lulworth Castle in September 2017.
"He did not intend to cause her harm and Louella willingly took that which she was given, but it had a terrible effect," he said.
captionCeon Broughton, 29, denies manslaughter and supplying Class A drugs
Mr Mousley said Ms Fletcher-Michie died after a "significant period of suffering".
He told the court Mr Broughton had continued filming over several hours, adding: "He even did so, the prosecution suggest, after she was apparently dead."
In video clips shown to the court, Ms Fletcher-Michie repeatedly shouts at Mr Broughton to telephone her mother but he tells her to "put your phone away".
Carol Fletcher-Michie eventually spoke to her daughter at 18:48 and grew concerned after she "could hear her screeching".
Her parents were so worried they set off for the festival, repeatedly messaging and calling Mr Broughton, the prosecutor told the jury.
Her brother, Sam, also contacted Mr Broughton and urged him to seek medical help. However, Mr Broughton replied saying "call back in an hour" and referred to Louella as a "drama queen", jurors heard.
The court was told by the prosecution that a month before Ms Fletcher-Michie's death, Mr Broughton was handed a 24-week prison sentence suspended for one year.
"His failure to get her treatment which may well have saved her life was borne of selfishness and in self-preservation," Mr Mousley said.
"Because to have done otherwise, to have acted positively, he knew would have exposed him to the possibility of arrest and prosecution for a criminal offence punishable with imprisonment."
"Failure to act was a substantial cause of her death," he added.
Ceon Broughton, 29, of Island Centre Way, Enfield, London, denies manslaughter and supplying Class A drugs.