The death of a 19 -year-old Virginia woman who died while in police custody from a gunshot wound to the head in July has been ruled a suicide by the medical examiner's office.

Police said Sarah Wilson managed to shoot herself through the mouth while her hands were cuffed behind her back following a drug bust during a traffic stop in Chesapeake on July 25.

Officers had left her unattended while in pursuit of her boyfriend, Holden Medlin, 27, during which time she is said to have obtained a gun from the Lexus she was riding in.

Wilson's mother, Dawn, said she doubted her daughter took her own life, based on what she said are witness accounts that point to police shooting Sarah.

No police body camera footage has been released from the incident, because police said it was knocked off during their pursuit of Medlin.

Police and the medical examiner in Chesapeake, Virginia said 19-year-old Sarah Wilson (left) shot and killed herself after officers pulled over her boyfriend's car. Holden Medlin (right), 27, allegedly resisted arrest and was charged with drug and weapons possession

Chesapeake police spokesperson Leo Kosinski spoke to Dailymail.com by phone on August 1 about Sarah's death, stating: 'the police did not shoot her... she died from suicide.'

Lt Kosinski confirmed at that time that Sarah had her hands restrained behind her back and said she was somehow able to reach into the car while an officer was not looking, grab the gun and take her own life.

'If you have anything motivating you and you’re limber enough, you can wiggle,' he noted.

But Sarah's mother, Dawn, told ABC 13 in August: 'Things are not matching up. Somewhere, somehow, there is a discrepancy.'

Police said Sarah Wilson (pictured in front, as a child, with her mother, Dawn) managed to shoot herself through the mouth while her hands were cuffed behind her back following a drug bust during a traffic stop in Chesapeake on July 25

But Sarah's mother, Dawn (right), said in August: 'Things are not matching up. Somewhere, somehow, there is a discrepancy.' Sarah is pictured left

'In all of her life I have never known of [Sarah] to shoot a gun, own a gun, or even hold a gun,' Dawn said.

She added: 'There is a few different stories, but they all end the same: that the police shot her.'

According to police, Sarah was riding as a passenger in a car operated by Medlin at 4.30pm on July 25 when police officers pulled the vehicle over at the intersection of Berkley Avenue and Wilson Road in Chesapeake.

Medlin became 'disorderly' during the stop and resisted arrest, leading officers to use a Taser on him, investigators said.

During the altercation between police and Medlin, police said an unattended Wilson grabbed a gun and shot herself in the head, reported WAVY.

Medlin and Wilson were stopped by police in Chesapeake, Virginia, on July 25 (pictured)

At the time of the incident, a friend of Sarah's shared a disturbing cellphone video on her Facebook page, purportedly recorded by a bystander at the scene of the traffic stop. In it, a woman's body is seen laying on the ground next to a white sedan, with police officers swarming the area. At one point, one bystander crudely remarks to another: 'police shot the b****'

At the time of the incident, a friend of Sarah's shared a disturbing cellphone video on her Facebook page, purportedly recorded by a bystander at the scene of the traffic stop.

In it, a woman's body is seen laying on the ground next to a white sedan, with police officers swarming the area.

At one point, one bystander crudely remarks to another: 'police shot the b****.'

The authenticity of the video has not been independently verified.

When asked to comment on the cellphone video, Kosinski said the person who recorded it arrived at the scene well after the incident.

'He made that up,' the spokesperson said in reference to the claim that an officer shot Wilson. 'He did not see anything.'

One of the officers at the scene was wearing a body camera, but it was knocked off the officer's uniform during the altercation with Medlin, police said.

Sarah's mother said her 19-year-old daughter, who went by the nickname ‘Sunshine,’ was a moody teenager but did not have a history of depression.

Sarah’s social media accounts indicate that Sarah (right) was in a relationship with Holden Medlin (left) since 2017

However, in early March she shared on her Facebook page a troubling post about depression, which read in part: 'why do people never talk about the part of depression when you just don't want anything anymore?...you just spend your day kinda waiting for it to end.'

Sarah’s social media accounts indicate that she was in a relationship with Medlin since 2017.

After Sarah's death, Medlin was booked into the Chesapeake City Jail on charges including possession of oxycodone, possession of suboxone, possession of paraphernalia, possession of a firearm with a schedule I or II drug, fleeing from a law enforcement officer, and being a felon in possession of a firearm

Medlin is accused of swallowing a 'golf-ball sized bag' of an unknown substance as officers approached the vehicle he was driving on the day of Sarah's death.

Authorities said the stop resulted in the confiscation of 11 oxycodone pills, a syringe, other drug paraphernalia, a rifle and ammunition.

Medlin's charges were certified by a grand jury on Tuesday.

For confidential support in the US, call the National Suicide Prevention Lifeline at 1-800-273-8255 or click here.

For confidential support on suicide matters in the UK, call the Samaritans on 08457 90 90 90, visit a local Samaritans branch or click here.

For confidential support in Australia, please call Lifeline on 13 11 14 or click here.