South Yorkshire Police did not name the suspect or provide his age. He was arrested on Tuesday, and released on bail on Wednesday pending further inquiries.
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“Our investigation launched immediately following this tragedy and we have been carrying out extensive inquiries ever since to piece together the events which led to the loss of Adam in these unprecedented circumstances,” Detective Chief Superintendent Becs Horsfall said.
Stephen Halloran, a criminal defense solicitor and managing director at Lawtons Solicitors in London, said manslaughter investigations are “not straightforward” and can be committed in several different ways in England and Wales. They can range from an offense that is not far from being an accident through to one that falls just short of murder.
He said that in this case police are potentially looking at involuntary manslaughter.
Halloran said that involuntary or unlawful act manslaughter is “when an unlawful killing has taken place but there was no intention to kill or to cause grievous bodily harm.”
In the case of voluntary manslaughter, all the elements for murder are present, including an intention to kill or cause serious harm, but the crime has been reduced to manslaughter by reason of loss of control or diminished responsibility due to a recognized mental condition.
Update: suspect released on bail.