This was heard at an inquest into the death of Abu Bokker Ali, whose body was found on August 29 at his home.
Following investigations by police, it is believed the 18-year-old had purchased the drug online, the inquest heard. The drug is many times stronger than morphine and is used to sedate large animals like elephants.
Coroner Christopher Wilkinson said he was ‘disturbed’ that the teenager was able to find the drug online – but added he was at ‘a complete loss’ in how to prevent someone else doing it.
‘It is terribly drastic and terribly sad,’ he said, and added: ‘The extent of the research and efforts he had gone to indicate to me an intent to take his own life.’
The discovery of the student’s body sparked a major emergency services operation. The house was evacuated and Grove Road was temporarily closed while a specialist team from South East Coast Ambulance Service was sent into the property wearing hazmat suits to put Mr Bokker Ali’s body in a chemical bio-hazard bag.
His foster parents and brother also had to be medically treated in a way which Mr Wilkinson described as ‘distressing for all of you’, but did not suffer any effects of the drug.
The inquest heard how Mr Bokker Ali, a fitness fan, used to regularly receive packages at his home address in Grove Road, Worthing.
In the days leading up to his death, he told his brother not to open the packages.
Mr Wilkinson said it was not clear whether he had bought the drug in small batches or one package contained the drug and the others were a decoy.
Notes were found by his body saying what he had done and why, leading his foster mother Valarie Fryer to think he was ‘very determined’ to carry out his plan.
The inquest heard that the teenager was plagued with self-image issues, which the coroner believed contributed to his death.
Mr Bokker Ali was put into foster care at age four with his brother following a traumatic upbringing, and showed signs of anxious behaviour.
At age 13, his anxiety led to him taking a year off school. He ended counselling with mental health services because he did not find them beneficial.
He was due to study sport science at university after getting good A-level results.
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