A friend of a man suspected of killing a nurse in a hit-run crash says he plans to hand himself into police.

On Wednesday police were knocking on doors at the homes of the friends and family of Sebastian Kennett, 20, who has been on the run since he allegedly smashed a stolen white Lexus into a Toyota Yaris in Oakleigh on Monday night, killing the driver, 53-year-old Lynda Hansen.

"He's a good kid, he honestly had no idea how bad it (the crash) was," Mr Kennett's friend Jasmine Boulter told Fairfax Media.

"He's not the criminal he's being made out to be. He's trying to cope with what's happened... he's real remorseful for his actions and will be handing himself in."