No.35 Polaris Street was the long-term home of the Enright family, and it was where Peter spent most of his short life before he disappeared in 1968 or 1969.
His disappearance might have gone unnoticed forever, if someone had not contacted police in August, triggering an investigation.
Weeks later, Peter’s mother, 76-year-old Maureen Anne Enright, was charged with murder and fronted Richlands Magistrates Court on Wednesday.
She would have been about 26 when her autistic son was allegedly killed. Peter’s father, Michael Enright, died in 2018.
Polaris Street is a typical suburban street, with fibro and brick homes set back behind grassy lawns, about half-an-hour’s drive from Brisbane’s CBD.
Peter was the fourth child of 11, born a year before the Enrights moved to their Inala home.
That home is now the subject of an extensive police investigation, as specialist officers scour the address for any evidence of his small body under the house or in the back yard.
Old bed frames, washing machines, tyres and machinery were hauled out from under the house to make way for police officers to search.
Police and specialist officers crawled underneath to set up scanning equipment, dragging equipment line by painstaking line, along the foundations to conjure a picture of what lay beneath.
On Friday, they returned to continue the search, the home left under guard overnight.
Birth certificates and other documentation obtained by police confirmed Peter’s existence, while his siblings were either not aware of his life or were allegedly told conflicting stories about what happened to him.
Queensland police homicide Detective Inspector Damien Hansen said Peter was “just an innocent child”, and appealed to former residents of Polaris Street in the ’60s and ’70s, who may have known the Enrights, to come forward.
Inspector Hansen said Peter’s family had been questioned about his disappearance, while police were tracking down former schoolmates and friends of his siblings to develop a full picture of the Enright’s family life.
He said Mrs Enright was “co-operating” with police but had given them “a number of versions” of what had happened.
“It’s just a shocking thing, that these things can happen,” Inspector Hansen said on Thursday.
“But processes back in the ’60s were obviously very different to what they are today.
“It’s the first time I’ve come across something like this.”
Long-term neighbours told Nine News they had no idea Peter existed.
Forensic police, science officers and bone experts were called in, and on Friday police began digging up the backyard of the home, as Mrs Enright faced court.
A frail, white-haired figure in front of the magistrate, she was helped up to the dock by a corrections officer, and said a soft “yes” when asked if she understood what was happening.
She made no application for bail, and her matter will return to court on December 11.
Solicitor Jyoti Pant, who represented Mrs Enright, told reporters outside court her client was an elderly and vulnerable member of the community.
“She is frail, she is vulnerable and so, understandably, [her family are] very concerned,” Ms Pant said.
“Our primary concern at the moment is to get her out on bail and back home with her family.
“We’ve just been provided material in relation to the charge and we’ll be going through that later today.”
If Peter were alive today, he would be 55 years old.
Lucy is the urban affairs reporter for the Brisbane Times, with a special interest in Brisbane City Council.