Further details have emerged of the alleged GoPro gang rape.

Police say the 45kg girl stood no chance against her alleged attackers.

It took police months to track down the victim and alleged rapists after they unwittingly came across “hideous” footage of a brutal gang rape while investigating graffiti offences.

Police believe at least four men took turns raping an unconscious 16-year-old girl during a 16-minute ordeal at a party at a home in St Clair, a suburb is Sydney’s west, in May and recorded the attack on the host’s GoPro camera, News Limited reports.

They are investigating whether the teen’s drink was spiked.

Police claim there were up to eight men in the room at the time of the attack, including a teenage boy.

The alleged attackers – some of whom are fathers of young children and are married or engaged – were identified by their tattoos and are believed to be childhood friends, some of whom play rugby together.

Three men and a 17-year-old were charged with rape on Wednesday.

Tristan Carlyle-Watson, 25, who allegedly laughed at the girl and egged on the alleged rapists, was charged with concealing an indictable offence.

Penrith Local Court heard yesterday Mr Carlyle-Watson encouraged the co-accused to engage in the “deplorable” conduct, Fairfax Media reports.

“At no stage did he try and help the victim, who was unconscious,” the prosecutor said.

News Limited reports he allegedly “laughed at the complainant at various stages” and told her “nothing happened” when she texted him the following day asking about the events of the previous night.

Court documents allege Mr Carlyle-Watson made “numerous attempts to contact the victim and influence her involvement”.

He was denied bail.

Andrew Waters, 23, and Kurt Stevenson, 25, both charged with aggravated sexual assault, did not apply for bail.

Ayden Devereux, 24, charged with aggravated sexual assault and filming a person in a private act without consent, also made no bail application.

They will reappear in court on December 10.

Related: A 16-year-old girl was just something for 8 men to break and throw away.
And we would never have known.

A 17-year-old boy – who cannot be identified – has been charged with sexual assault offences and appeared in the Children’s Court, but did not apply for bail.

Child Abuse Squad Detective Inspector Peter Yeomans said the 45kg girl stood no chance of repelling her attackers, News Limited reports.

“It’s a hideous crime committed on a young child committed by five males, including a juvenile. Police are appalled by the footage,” he said.

“It’s terrible what happened to this young girl, I had a number of my investigators looking at this and they were horrified with what they saw in this footage.”

For domestic violence and sexual assault support 24/7, call 1800 RESPECT (1800 737 732).