Malcolm Bell died six days after he was rushed to hospital. Photo / Supplied
'You killed my baby'
Reading a statement to the High Court at Auckland, Malcolm's mother, Savanna Bell, said she was haunted at night by visions of her son's "little body" being smashed.
"You're a liar, a coward, a monster," she told Welsh.
"You killed my baby," she said, adding that in her opinion that was murder.
"The world around me was spinning out of control. I just had to get to my son."
As she ran, she dialled 111 and spoke to an ambulance call-taker.
When the ambulance arrived at 7.43pm, paramedics would describe the unresponsive boy's breathing then as "slow and laboured".
Bell said Welsh had failed to tell the truth about what happened and she sometimes wondered if her boy would have received the help he needed if Welsh had told the truth.
She later watched Malcolm slip away in hospital, the court heard.
The Herald has previously reported that Oranga Tamariki had been contacted with concerns about the welfare of Malcolm before he suffered fatal injuries.
After his death the agency initially declined to comment before an Auckland manager then said they had been working to support to him and his whānau before his death.