A 27-year-old Irish doctoral researcher has been identified following a post-mortem examination conducted at a cinema in Oxford.
Mark Anthony Jennings, a PhD candidate at the University of Oxford, was discovered deceased in toilet facilities at the Curzon cinema within the Oxford Westgate Shopping Centre on April 28, 2026.
The deceased had been enrolled at Christ Church College since September 2021, undertaking research in the Mathematics of Random Systems.
An inquest into his death was overseen by senior coroner Darren Michael Salter on October 7.
The cause of death was recorded as a non-traumatic subarachnoid haemorrhage, with ketamine use identified as a possible contributing factor.
Prior to his studies at Oxford, Jennings had completed an undergraduate degree in Mathematics at University College Dublin, achieving First-Class honours.
In 2020, he was honoured with the university’s prestigious Hamilton Prize in Mathematics, awarded to exceptional students during their penultimate year of study.
On the evening preceding his death, Jennings attended the cinema alongside his companion Liam, a friend since childhood.
During the screening, Jennings departed to use the restroom, leaving his headwear behind.
Cinema employees subsequently located him unconscious within a locked stall, necessitating the use of a key to gain entry and initiate emergency response procedures.
Emergency services were summoned following a call from South Central Ambulance Service to Thames Valley Police at 11.54pm.
Despite intervention from air and land ambulance personnel, resuscitation efforts proved unsuccessful.
CCTV footage captured Liam searching the premises for someone at approximately 11.18pm, though imaging did not reveal Jennings departing screen three or entering the toilet area.
Forensic pathologist Dr Alistair Easton conducted the post-mortem examination in May, producing two toxicology assessments and one histology report.
Alcohol levels measured 234mg per 100ml of blood, approaching three times the statutory driving limit of 80mg.
Ketamine was detected at a concentration of 1,300ng per ml, consistent with recent moderate consumption.
Medical evidence presented indicated that levels exceeding 4,000ng per ml are typically associated with potentially fatal outcomes, though fatalities resulting from ketamine toxicity remain uncommon.
The specialist testified that ketamine consumption produces a temporary elevation in blood pressure capable of precipitating a haemorrhagic stroke.
He further noted that medical guidance advises against administering the substance to individuals with elevated stroke risk, though such occurrences remain highly improbable and exceedingly rare.
On the day of his death, Jennings had attended an appointment with psychiatrist Dr De La Motte, accompanied by his father.
Evidence indicated he maintained a positive relationship with his family and his passing came as an unexpected tragedy.
Jennings had been prescribed Vortioxetine, an antidepressant medication, which was detected at therapeutic concentrations during the post-mortem investigation.
Additionally, signs of pre-existing cardiovascular disease were identified.
Dr De La Motte testified that the neuro-antidepressant was unlikely to have caused the stroke, given that it had only recently been prescribed and Jennings had probably consumed a single 10mg dose.
Approximately one week earlier, Jennings had undergone triage for a medical assessment by his general practitioner, Susana Jenkin, who expressed concern.
Family members reported that he had experienced depressed mood since 2021.
Medical professionals informed him that his recent low spirits may have been linked to ketamine and alcohol consumption, recommending he diminish his intake due to potential jeopardy to his wellbeing and survival.
Additional support options were presented, including hospital admission, though Dr De La Motte indicated Jennings was unreceptive to these measures and appeared well following their consultation.
The inquest identified potential improvements in care pathways that might have facilitated earlier intervention for Jennings, including enhanced clinical record-keeping practices.
Considerations arose regarding the inclusion of alcohol in the formal conclusion, which was ultimately omitted, alongside deliberations over whether to classify the death as resulting from natural causes, substance-related factors, or a combination thereof.