Two police community support officers (PCSOs) were told where a 10-year-old boy was last seen before he drowned in a pond, the child's mother has claimed.
Jordon Lyon died after jumping into John Pit pond in Wigan, Greater Manchester, to save his sister in May.
He had already slipped from view when the PCSOs arrived, but calling for a second inquest, his mother said two fishermen showed them where he was.
Greater Manchester Police has supported the PCSOs, saying they acted correctly.
Jordon's mother, Tracy Ganderton said the PCSOs, understood to be a man and woman, should be compelled to give evidence if her request for a second inquest was granted.
They were criticised by Mr and Mrs Ganderton last week for not doing more to stop their son from drowning.
Jordon had dived into the water after his eight-year-old step-sister Bethany got into difficulties while swimming at the former quarry.
The pond is at a well-known beauty spot in Wigan
Two anglers, aged 63 and 65, spotted Bethany who was being held up by Jordon with his head under the water.
Mrs Ganderton, of Bluebell Avenue, Wigan, is disputing the police view that the officers had no idea where Jordon was in the water.
She said: "The anglers pointed out to them where Jordon had gone under but they still did nothing to save him.
"He could be here today if they had gone in like any member of the public would have done if they had been walking past.
"The fishermen told my husband Anthony what they had said to the PCSOs.
"These two PCSOs are among the main witnesses to my son's death. I want to know exactly what they did or didn't do at a new inquest."
A verdict of accidental death was recorded at Jordon's inquest but neither PCSO gave evidence.
Former home secretary David Blunkett - who introduced PCSOs - has said that "as human beings" they should have gone into the water to try to find Jordon.
But Greater Manchester Police has given its full support to the PCSOs, who it says acted correctly.
Assistant Chief Constable Dave Thompson has described the large pond as a "lake" which was the size of a football pitch.
He said the water was black with "very poor" visibility beneath the surface.
Mr Thompson also said that the inquest established Jordon was probably dead by the time the PCSOs arrived.