An inquest into the death of Noah Donohoe heard toxicology evidence that found no traces of drugs in samples from his body. The 14-year-old schoolboy from St Malachy's College disappeared in north Belfast in June 2020. His body was recovered six days later from a storm drain tunnel.

Forensic scientist Amy Quinn from Forensic Science Northern Ireland analysed blood and urine samples on 2 July 2020. Consultant toxicologist Dr Simon Elliott reviewed and tested samples further in November 2024. Both gave evidence at Belfast Coroners Court.

The experts stated tests covered methamphetamine, ecstasy, benzodiazepines, cocaine, cannabis, ketamine, opiates, fentanyl, antidepressants and paracetamol. None returned positive results. Tests also showed no influence of alcohol at death. A small amount of alcohol in blood resulted from post-mortem generation.

Quinn and Elliott agreed screening cannot cover thousands of drugs. They noted hundreds of synthetic cannabinoid variants, known as spice, exist beyond test scope. Some drugs degrade quickly and become undetectable in post-mortem samples.

The witnesses confirmed unstable substances may break down before analysis. This means presence of certain drugs at death cannot be fully excluded. Elliott noted some drugs vanish from the body within hours.

Quinn applied testing level standard for murder cases. The inquest continues.