An eight-year-old boy died after a multi-vehicle crash on the A30 near Connor Downs, near Hayle, in Cornwall, on Friday morning, and police have since arrested a local man in his 60s on suspicion of causing death by dangerous driving and causing serious injury by dangerous driving.

The five-year-old boy who was in the same car remained in hospital in a critical condition, while two women travelling with the children were seriously injured. One of those women was in her 70s. A woman in her 40s was also taken to hospital but was later discharged.

Emergency services were called shortly before 11:00 BST, and the road stayed shut for about 12 hours while investigators worked at the scene. That closure turned a Friday morning collision into a day-long disruption on one of Cornwall’s main routes, but the human cost was far greater than the traffic delay.

Michaela Hall’s family is now taking legal action against the police and the probation service, a reminder that the aftermath of a fatal crash does not end when the wreckage is cleared away. In this case, the man arrested suffered minor injuries and has been released under investigation, while police have not disclosed what caused the collision.

That gap is now at the centre of the inquiry. Investigators have asked people not to speculate, and specialists from the Roads Policing Team and Serious Collisions Investigation Team continued enquiries through the weekend. They are also appealing for witnesses and dash cam footage from the westbound carriageway.

The immediate answer for families is already clear: one child is dead, another remains critically ill, and several others were badly hurt. The next answer will have to come from the evidence, as police pursue several lines of enquiry over the coming weeks.