The teenager who escaped with his life after alleged being shot by Julian Ingram has described the moment he saw his friend’s mother gunned down.

WARNING: Graphic content.

The teenager who survived after being allegedly shot by Julian Ingram has described the moment he saw the alleged triple killer laugh as he opened fire.

Ingram has been on the run from authorities for four days and is wanted after three people – including his ex-partner Sophie Quinn – were fatally shot in Lake Cargelligo on Thursday afternoon.

Ms Quinn, 25, and her friend John Harris, 32, were found dead with gunshot wounds inside a car.

Sophie’s aunt Nerida Quinn was also shot dead the same day while 19-year-old Kaleb Macqueen was seriously injured.

Mr Macqueen on Sunday told Nine News that he saw Ingram drive up to the home of Nerida Quinn, his friend’s mother, before opening fire.

“She’s obviously went towards the ute,” Mr Macqueen told Nine News.

“I heard boom boom … she was holding her neck and he was laughing and gave her one good shot to the head and she was gone.”

Julian Ingram has been on the run for four days. Picture: NSW Police.

Kaleb Macqueen was seriously injured in the Lake Cargelligo shooting. Picture: Nine News
He said there was nothing he could have done to save Ms Quinn.