Diego Maradona's personal doctor was on Sunday being investigated for involuntary manslaughter four days after the Argentina legend suffered a fatal heart attack, prosecutors in San Isidro near Buenos Aires reported.
Police raided Leopoldo Luque's surgery and home in search of possible evidence pointing to negligence, according to television images.
Maradona returned home to Tigre where he received round-the-clock medical care and could remain close to his daughters.
Maradona's lawyer, Matias Morla, had called for an investigation into claims that ambulances took more than half an hour to reach the football star's house in response to an emergency call on the day of his death.
The prosecutor's office is awaiting the results of toxicological tests on Maradona's body. The three prosecutors working on the case have requested his medical records, as well as recordings from neighbourhood security cameras.