A 20-year-old man who was "badly affected" by the gangland shootings of his father and uncle took his own life just two days after he discharged himself from hospital.
Glen Murphy McNally, from Fairlawn Park, Finglas, had a history of self-harm and had attempted suicide the previous week. His body was taken from the Royal Canal on April 12
Relatives at an inquest into his death claimed "he should never had been let out of hospital".
Dublin Coroner's Court heard how Glen was "very badly affected" by the death of his father and his uncle.
Glen's father was Graham McNally, who was 34 when he was shot dead in January, 2009. His body was subsequently found in a ditch at Coldwinters, Finglas, north Dublin. Two men have been charged with his murder and are due to go on trial late next year.
Glen's uncle Alan McNally was aged 36 when he was also shot dead in 2012.
On April 10 last year, Glen had tried to take his own life.
His cousin, Conor, said Glen had been smoking heroin in the days leading up to the overdose.
Glen was admitted to the intensive care unit at the Mater Hospital. Dr Adam Emechebe said that during a psychiatric evaluation on the morning of April 12 Glen denied trying to take his own life.
"He denied any ongoing thoughts of suicide or self harm. He denied any active thoughts of suicide," Dr Emechebe said.
"He expressed remorse over the overdose. He said it was because he felt he needed something ... to 'Get a buzz',"
Dr Emechebe felt Glen was fit to be transferred from ICU to the medical ward.
Glen's mother, Jennifer Murphy, said she wanted her son detained under the Mental Health Act for his own safety.
"From my assessment and what he was saying, he did not present as clinically depressed at that time," Dr Emechebe said.
Consultant psychiatrist John Sheehan said medics were treating up to 800 overdoses a year.
He outlined strict criteria to detain a person against their will, including the presence of a mental illness and an immediate risk to self or others.
A person cannot be detained if their primary problem is drug or alcohol addiction.
"The person has to seek help," Dr Sheehan said.
Jennifer Murphy said she believes her son "just told the psychiatrists what they wanted to hear".
Toxicology results showed evidence of morphine, cocaine and the anti-depressant citalopram in Glen's system.
The cause of death was consistent with drowning and Coroner Dr Brian Farrell returned an open verdict.
*The Samaritans 24hr helpline is 116 123