"
A postmortem was conducted on the day of her death. The
autopsy report noted that “clear froth was observed coming from her mouth”; it also recorded that she had a history of asthma.
Toxicology tests on her blood recorded the presence of the heroin substitute methadone, cocaine and the anxiety-inhibiting drug Alprazolam. Though no alcohol was found, trace elements of a metabolite suggested she had earlier been drinking.
The medical examiner concluded that Proctor’s death had been an accident caused by “complications of polydrug overdose”. The Guardian contacted an independent forensic toxicologist who confirmed that the combination of drugs in her blood at the levels recorded could have been sufficient to cause death."