Massimo Chesini, 19, shot grandfather, Pietro Chesini, 81, over money dispute at Newton

Grandfather Pietro Chesini was an immigrant who built a hugely successful family business from scratch before being gunned down by his grandson Massimo over an alleged dispute about money.

Massimo Chesini went to his grandfather’s house and shot him twice before fleeing the scene and turning the gun on himself.

The 19-year-old shot Pietro Chesini, 81, at a home on Liascos Ave at Newton on Tuesday night, causing heartbreak for his family and shocking residents in the close-knit community in Adelaide’s northeast

The shooting came after an alleged dispute over money, according to 7NEWS.

Massimo’s body was later found on the banks of the River Torrens. His cause of death is believed to be a self-inflicted gunshot wound.

Massimo Chesini has been revealed as the Newton shooter. Picture: Facebook

Pietro Chesini was allegedly shot by his grandson at Newton. Picture: 7NEWS

Assistant Police Commissioner Scott Duval said the firearm used in the incident, which was licensed, was found next to the teenager’s body.

Pietro was rushed to the Royal Adelaide Hospital at 4pm with gunshot wounds to the arm and leg.

He remained in a critical condition last night.

STAR Group officers searched for the shooter, before a car that police said belonged to the suspect was found on Gorge Rd at Athelstone about 7.20pm. Massimo’s body was discovered about two hours later near the River Torrens at Athelstone.

There are no suspicious circumstances in his death and police are preparing a report for the Coroner.

A woman from the same house, a relative of Pietro, was also taken to the RAH where she was treated for shock.

Pietro owned Chesini House, a family business he built from scratch after he and his wife Rita migrated to Adelaide in 1978 with their young family from Sant’Ambrogio di Valpolicella, a small town on the outskirts of Verona, Italy, according to the business website.

John and Luca Chesini, the two youngest sons of Pietro and Rita now handle the day to day operation of the company, which makes stone benchtops.

The business has made stone work products for high-profile places such as the State Library and Governor’s House in Adelaide.

Mr Duval also confirmed a police officer’s gun was accidentally discharged while arresting another man, 53-year-old Wayne Hammet. He was charged with hindering police.

A police officer was injured during that incident.

His body was found on Tuesday evening at Athelstone on Tuesday night. Picture: 7NEWS

“I can say that discharge of a firearm was not intentional and an internal investigation is currently being conducted in relation to the circumstances surrounding that,” Mr Duval said.

Mr Hammet was released on police bail, and said a gun was pointed at him by police.

“He pointed the gun at me, I said ‘don’t, there’s no reason to point the gun at me’, and his finger on the trigger and then he started pushing me with it and I didn’t let him contact with me because I kept going back and grabbing it,” he told 7NEWS.