Police say they are not looking for any other suspects related to the shooting of an 81-year-old in Adelaide's north-east, after the body of a suspected gunman was found on Tuesday night.
Police confirmed their suspected gunman was a 19-year-old male "known to the victim as a family member" but would not confirm if he was his grandson.
The 19-year-old's body was found last night near the River Torrens, several hours after the shooting at the elderly victim's home.
Earlier yesterday, the 81-year-old was rushed to the Royal Adelaide Hospital with gunshot wounds to his arm and leg, after emergency services were called to Liascos Avenue at Newton about 4pm.
He was initially treated by paramedics at the scene and remains in a critical but stable condition, police said.
Assistant Police Commissioner Scott Duval said that, after a search of nearby houses, detectives later found a vehicle on Gorge Road, about 7:20pm, believed to have been driven by the suspect.
"At about 9:30pm, the body of a 19-year-old man was located deceased near the river Torrens," he said.
"The firearm believed to have been used in this incident was located near the body of that man."
His death is not being treated as suspicious.
Assistant commissioner Duval said police were not seeking other suspects at this stage, but were "keeping an open mind".
A woman related to the elderly victim, and who lived at the same house, was also taken to hospital suffering from shock.
A neighbour said a shooting on an otherwise "pretty quiet" street made him feel "a little bit worried".
"Someone got shot, that's all I know," he said.
"I saw the police going up and down with cars."
Police gun 'discharged' during struggle
Just before 7pm, another man was escorted from a house on Liascos Avenue, then handcuffed and loaded into a police vehicle.
Assistant commissioner Duval said the arrest was "unrelated" to their investigation.
"While police were approaching the victim’s property, a member of the public engaged with police and it will be alleged there was a struggle … and, during that struggle, a police firearm was discharged," he said.
"The shot discharged into the ground and there were some very minor injuries to another police officer that didn't require medical treatment."
A 53-year-old man was charged with hindering police and has since been released on bail.
Police appeal for more information
Police will prepare a report for the coroner and have asked anyone with information about the shooting to contact Crime Stoppers.
"It's such a fresh investigation that they want to piece all parts of the jigsaw together so that's why we do ask anyone with information to contact Crime Stoppers on 1800 333 000," Senior Constable Kylee Simpson said.
Assistant Commissioner Duval said he could not comment on whether the 19-year-old had any underlying mental health issues, or why the incident may have occurred.
“This is a very traumatic circumstance. It's a family member who's been involved in this and our hearts go out to the family in very difficult circumstances," he said.
Gorge Road was closed between Bermuda Court and Corkscrew Road while police searched for the suspect.
