Lawyers for the estate of Aaron Hernandez want to know why guards never intervened as the former Patriots star made extensive preparations for his jailhouse suicide — and they say they are now mulling a negligence suit against Massachusetts correction officials.

“We are very concerned about the loss of evidence in this case,” Hernandez lawyer George Leontire told a Massachusetts Superior Court judge Friday, in successfully asking that correction officials be ordered to preserve video, photographic, phone and health records relevant to the suicide, along with evidence from the scene itself.

Hernandez’s estate — now represented by his former fiancee, Shayanna Jenkins Hernandez, mother to his four-year-old daughter — is mulling a “negligent supervision” lawsuit, Leontire said in court, a Boston Herald reporter tweeted.

Before hanging himself early Wednesday, Hernandez wrote three suicide notes, jammed cardboard into his cell door, scrawled “John 3:16” on his forehead in red marker, fashioned his bed sheet into a noose and smeared soap on his floor so he wouldn’t gain traction if he lost his nerve at the last minute, according to official and news reports.

But only when he was past help did guards rush in; Hernandez died of asphyxia due to hanging, local coroners ruled.

Also during Friday’s court hearing, Leontire slammed correction officials for their apparent poor communication with Hernandez’s family. Hernandez’s fiancee had to learn about the ex-player’s suicide notes from the media, he complained.

Three notes found in Hernandez’s cell included letters to his daughter and fiancee, saying he loved them and would see them in heaven, according to the Boston Herald.

The family also learned only from press accounts that Hernandez had written “John 3:16” on his forehead from press accounts, Leontire complained, telling the judge, “They don’t know if that’s true or not.”

Hernandez had been in a Massachusetts prison serving life without parole for the shooting murder of his friend, Odin Lloyd.

Also Friday Lloyd’s mother, Ursula Ward, met with reporters to say she would continue to press her wrongful death suit against the Hernandez estate.

Her lawyer, Douglas Sheff, told reporters that he has reached out to Patriots officials to ask that they voluntarily turn over to Lloyd’s survivors some of the contract cash Hernandez may be entitled to.

“We issued them a friendly challenge,” he said.

“I pray to God that his soul is at peace,” the grieving mother told reporters of Hernandez.

“I pray to God that he finds comfort, and god will forgive him of whatever happened.”