A nurse caring for Diego Maradona was likely the last person to see the star alive, at dawn on Wednesday, prosecutors investigating his death said on Friday.
"From his words, it could be established that he was the last person to see him alive at approximately 6.30 in the morning," as the night shift was ending, a statement from the prosecutor's office said.
Maradona was receiving round the clock medical care as he was recovering from an operation to remove a clot on his brain in early November.
The nurse, interviewed by prosecutors on Thursday, "referred to having found him resting in his bed, assuring that he was sleeping and breathing normally."
Maradona's nephew Johnny Herrera was previously believed to have been the last person to see Maradona, at 11.30 pm on Tuesday.
Argentina's Attorney General's Office is carrying out a routine investigation into the circumstances surrounding Maradona's death.
The death is being investigated "because he is a person who died at home and no one signed his death certificate. It does not mean there are suspicions or irregularities," a judicial source told AFP.
A preliminary autopsy report established that Maradona died in his sleep at noon on Wednesday of "acute lung edema and chronic heart failure."
Prosecutors said the nurse present in his house at the time of death told them that she had heard Maradona "moving around inside the room" at 7.30 am.
Prosecutors said that at 12.17 pm "Maradona's personal secretary requested medical assistance, and an ambulance from the company +VIDA was present at 12.28 pm, according to film records from the San Andres neighborhood obtained by the Prosecutor's Office."
Several ambulances from other medical service providers arrived later.
Investigators have also established that Maradona's personal doctor Leopoldo Luque had already made a 911 call at 12:16 pm, requesting an ambulance.
Prosecutors say they are investigating Maradona's medical history, as well as call records to and from the house. They have also requested further autopsy reports.