A man charged with murdering his six-year-old son has been found dead in his cell at a Sussex prison.
Jethro Field's body was discovered at a house in Farncombe
Dafydd Field was found at HMP Lewes on Tuesday, the Prison Service said. It is believed he electrocuted himself.
A post-mortem examination found that his son Jethro died from head injuries caused by a brick, a knife cut to the throat and stab injuries to his chest.
The 52-year-old teaching assistant had appeared before Dorking magistrates on Saturday and been remanded in custody.
He was due before the Old Bailey in July.
Police found the boy's body in an upstairs bedroom of a house in George Road, Farncombe, Surrey, on 4 April, following a telephone call from Mr Field.
He said he had killed his son and wanted police officers to get to the house before his wife, Stevie, arrived to collect Jethro for the day.
The couple had been married for 10 years but had been living apart for just under a week, and had agreed to take turns to look after their son.
Mr Field then handed himself in at a police station in Tywyn in Gwynedd, Wales, two hours after his son's body was discovered.
Staff and paramedics tried to resuscitate Mr Field but he was pronounced dead at 0642 BST, a Prison Service spokesman said.
He said there would be an investigation by the Prisons and Probation Ombudsman, but added: "Indications are it was self-inflicted and appears to be electrocution."
Jethro's mother, Stevie Field, issued a statement saying: "I would like to send thanks from myself, and Jethro's brothers and sisters, to all our friends, family, neighbours, colleagues, the police and the entire community for their amazing compassion, love and support.
"We will forever miss Jethro - he was such a special boy and no words can express how sad we feel.
"We will all miss his happiness, inquisitiveness, sense of humour, strength and love."
A spokeswoman for Surrey Police said the force would be co-operating fully with the Prison Service inquiry, supported by Sussex Police.
She said: "Every death in custody has to be investigated. There will be a full investigation into what took place and obviously our investigation will have to be re-examined."
The post-mortem examination of Jethro Field was carried out at the Royal Surrey County Hospital.
Senior investigating officer Det Ch Insp Maria Woodall said: "We will continue to gather evidence for a coroner's inquest into Jethro's death which will take place at a date to be set in the future."