An emotional funeral has taken place for one of the five teenagers who died in a devastating wrong-way collision on Ireland’s M9 motorway, as police maintained a heavy presence around the ceremony amid heightened public attention following the tragedy.

Jeremy O’Brien, 18, was laid to rest on Monday, becoming the fourth of the five teenagers killed in the crash to be buried. His funeral Mass was held at the Holy Family Church in Askea, Carlow, where relatives, friends and members of the local community gathered to remember him.

The teenager died in the early hours of Sunday, August 16, when the BMW in which he was travelling was being driven against the normal direction of traffic on the M9 in County Kildare. The car collided head-on with another vehicle travelling towards Dublin Airport.

O’Brien was one of five teenagers who lost their lives in the collision. The others were Joey Carthy, 15, and three 17-year-olds, Jack Kennedy, Kamil Pustkowski and Alex McCarthy. All five were in the BMW and died in the crash.

Heavy Police Presence in Carlow

The funeral was held under heightened security, with armed Gardaí stationed at checkpoints on roads leading into Carlow.

The significant police presence reflected concerns about possible disorder surrounding the funerals following the highly controversial circumstances of the crash. Police had also maintained a visible presence at earlier funeral services for the teenagers.

Despite the security operation, mourners gathered to pay their respects to O’Brien. Young men attending the service were seen wearing T-shirts bearing an image of the teenager, while family members and friends came together to say goodbye.

Following the funeral Mass, a horse-drawn carriage was used to transport the coffin away from the church.

Inside the church, Father Tom Little spoke to mourners about the profound grief caused by the teenager’s death. He described a deep sense of sadness and loss as the community continued to come to terms with what had happened.

Five Lives Lost in a Matter of Moments

The deaths of the five teenagers followed a crash at approximately 3am on August 16.

According to investigators, a BMW was travelling southbound on the northbound carriageway of the M9 between Junctions 3 and 4 in County Kildare when it collided head-on with another vehicle.

All five occupants of the BMW died at the scene. The occupants of the other vehicle were members of the same family travelling towards Dublin Airport.

Three women — sisters Ella Hendricken, Niamh Kinsella and Alma Kinsella — and Alma’s young son were seriously injured. The family had been travelling to the airport ahead of a trip connected with a family wedding.

The surviving family members remained in hospital with serious injuries, turning the tragedy into an even wider source of grief for relatives and the local community.

Previous Funerals Drew Large Crowds

O’Brien’s funeral followed several other services for the teenagers killed in the collision.

Funeral ceremonies had already been held for Joey Carthy and Alex McCarthy, while Kamil Pustkowski was also laid to rest in a private ceremony. The funerals attracted large numbers of mourners and significant police attention.

At Joe Carthy’s funeral in Athy, the 15-year-old’s coffin was brought to the church on a white horse-drawn carriage. Mourners included young people wearing white T-shirts featuring his photograph, while others carried framed pictures of him.

Alex McCarthy’s funeral in Carlow was similarly emotional. His coffin was carried into the Church of the Holy Family, with mourners gathering to remember the 16-year-old.

The ceremonies have taken place against a backdrop of intense national discussion about the circumstances of the crash and the behaviour allegedly associated with the teenagers.

Questions Over Dangerous Driving

The M9 tragedy has generated a wider debate in Ireland over dangerous driving, youth crime and the influence of social media.

Authorities have been examining reports that some of the teenagers were associated with online material involving illegal driving and vehicle theft. Footage allegedly connected to dangerous driving behaviour has circulated on social-media platforms, prompting renewed criticism of content that appears to encourage reckless behaviour for attention or online popularity.

Irish lawmakers have also questioned TikTok over how material glorifying dangerous driving is handled. The issue has become particularly sensitive following the deaths of the five teenagers and the serious injuries suffered by the innocent family in the other vehicle.

At the same time, the tragedy has produced a difficult public conversation about how the teenagers should be remembered. While some have condemned the alleged behaviour that preceded the collision, relatives and community members have urged people not to forget that five young lives were also lost.

A Community Still Grieving

For Jeremy O’Brien’s family and friends, Monday’s funeral was ultimately a farewell to an 18-year-old whose life ended in an extraordinary and devastating sequence of events.

The funeral Mass provided an opportunity for those closest to him to mourn away from the headlines and remember him as a son, friend and member of his community.

Yet the circumstances of his death continue to raise unanswered questions. Gardaí remain focused on establishing precisely what happened during the hours leading up to the M9 collision, including the circumstances surrounding the BMW’s journey in the wrong direction.

The investigation comes as Ireland continues to grapple with the consequences of the crash — five teenagers dead, four members of another family seriously injured, and communities left to mourn a tragedy that unfolded in only a matter of minutes.