A father killed his 15-week-old son by shaking him so hard his eyes bled, a court has heard.
Matthew Jones from Ebbw Vale is accused of murdering his baby son Cody Rhys Williams-Jones.
Jones, 26, is on trial at Newport Crown Court where he denies the murder and manslaughter of his son.
Jones, an electrical engineer at the Royal Glamorgan Hospital, is alleged to have shaken Cody on December 7, 2016, with such force that he was left with "catastrophic and fatal injuries" to his head and eyes.
The court heard that Cody, who died at the University Hospital Wales in Cardiff on December 8, was also found to have older injuries including fractures to his ribs and left arm and a bleed on the brain.
Prosecutor Paul Lewis QC said Jones had been working a night shift on December 6 and returned to the family home on South Bank at around 8.30am on December 7 before going to bed.
At around 5pm, Jones’ partner and Cody’s mother, Paula Williams, left the baby alone with Jones while she went to visit her sister who lived nearby.
Mr Lewis told the court Cody was a “perfectly healthy and happy child” when Ms Williams left the family home.
But just after 6pm, Ms Williams received a call from Jones who said Cody wouldn’t stop crying. She told him to use some teething gel to soothe him. A few minutes later, Jones called Ms Williams again, saying “it’s the baby, I don’t know what’s wrong” and told her to come home immediately.
When she arrived, she saw Jones in the street holding Cody who appeared to be “floppy”.
Mr Lewis told the court that Cody was taken to Nevill Hall Hospital in Abergavenny and a CT scan showed a recent subdural hemorrhage on the left side of his brain and further bleeding to the right side.
He was transferred to University Hospital of Wales where further a scan showed that Cody also had swelling on the brain. Cody underwent emergency surgery but died the following day.
The court was told that on December 21, 2016, Jones told the police that he was holding Cody when he reached for teething gel and a dummy and Cody pushed back and fell onto the bed.
Jones said Cody hit the bottom of his head or the top of he neck before bouncing back into the air.
He told police Cody was "lifeless" and "making choking noises".
Mr Lewis told the trial that a post-mortem examination found Cody’s injuries were likely due to an “episode of abusive head trauma involving a shaking mechanism”.
The post-mortem found that Cody suffered bleeding on two parts of his brain, swelling on the brain, retinal hemorrhages (multiple small bleeds in both of his eyes) and a bruise on his forehead.
The medical cause of death given by the pathologist was “a catastrophic head injury”.
Mr Lewis said: "Expert medical opinion is that the low-level fall from the defendant's arms onto a bed could never have caused the retinal haemorrhages observed.
"A specialist in the field said the type of scenario that might cause such injury is a high speed car crash."
"We allege that the injuries were as the result of deliberate violence that the defendant used against him - probably in the form of both shaking and impact.
"We suggest that the medical evidence will be such that an accidental fall can be excluded."
Defending Jones, Richard Smith said: “This is a good man, he is not an evil man. He loved Cody.
“We will hear from the evidence that Cody was a strong little boy. He would push away on occasion. He was a difficult young baby and was a demanding baby who left mother and father tired.”
Mr Smith told the court the explanation Jones had given to the police was what happened on December 6 and that two and half years later it is the explanation Jones stands by.
The trial continues.