The body of Ciro Lametta, who died in the crash near the city of Avellino in Campania on July 28th, was tested as part of a wider manslaughter investigation.
“We hope that the investigation moves forward and absolutely establishes that Lametta was not responsible,” Antonio Mirra, the lawyer representing the families of those who died. told Rai News 24.
“We are certain that the actions of the driver are not to blame,” he added.
The driver’s brother, Gennaro Lametta, has also been questioned as he owns the Naples bus operator Mondo Travel.
Autostrade, the company responsible for maintaining the road and crash barrier, is also under investigation.
The concrete barrier shattered on impact, causing the bus to fall 30 metres. Just nine people survived.
The 48 passengers were returning from a pilgrimage to Pietrelcina, the birthplace of Italian priest Saint Pio, when the accident happened.
The crash was the deadliest in western Europe in the last decade.