A suspended driver charged over a hit-and run in Sydney's south-west that killed a teenager at the weekend has been refused bail.
Natasha Gadd, 19, died when she was struck by a ute on Henry Lawson Drive at Milperra just after 4:00am on Sunday.
Police found the white Toyota Hilux they believed was involved in the incident at a factory at St Peters on Tuesday night.
Seng Hong Mam, 36, was later arrested at a home at Old Guildford.
He was charged with several offences including dangerous driving causing death and driving with a suspended licence.
Mam was refused bail at Fairfield Local Court on Wednesday.
"The loss of life in circumstances like this and then someone to flee the scene and make arrangements in affect to cover up any involvement; they're significant risks," Magistrate Peter Miszalski said.
"With the nature of this offence there's only one outcome in the long run."
The maximum penalty for the offence is 10 years in jail.
Driver allegedly had his ute fixed
Police prosecutor Mel Kilminster opposed bail.
"He's an extreme flight risk, he's had nine breaches of bail and has a long criminal record," she told the court.
Ms Kilminster alleged Mam fixed his ute to hide the fact it had been in an accident.
"When leaving the scene he's also fixed damage to the vehicle … and still made no steps to contact the police."
Mam's lawyer Karen Lai had applied for bail and said her client could abide by conditions including that he would live at home with his mother and report to police daily.
"Although there was a delay in presenting to police, when he was spoken to he did participate in an interview and has made certain admissions to the offence," Ms Lai said.
'I never knew heartbreak until today'
Earlier on Wednesday, Detective Inspector Katie Orr said police would allege Mam struck Ms Gadd while she was walking with friends.
Paramedics attempted to resuscitate Ms Gadd at the scene but were unsuccessful.
"We hope this provides some closure, they're aware of the arrest and although it won't bring their daughter back, we hope it'll provide some closure for the family," Detective Inspector Orr said.
"They're obviously very distraught still."
Almost $20,000 has been raised on a GoFundMe page to support her family.
Ms Gadd's family and friends have remembered her as "one of a kind".
"She was intelligent, always smiling, a best friend to many and she was truly one of a kind," one online tribute read.
"Any death is sad in itself, but losing the rock of your family has absolutely shattered her loved ones."
Another family member said their "tears won't stop".
"I can't believe ur (sic) not coming home, the tears won't stop I love you so much," they posted.
"I never knew true heartbreak until today."
Drivers obliged to render assistance
Police warned the public to stop if they hit a person while driving.
"If you do hit someone, you're obliged to stop and you're obliged to render assistance," Detective Inspector Orr said.
"I would advise not to drive away."