A new charity accused Sanger of trafficking young women to work as prostitutes and forced them into sexual slavery.
The Sanger Institution of Hope is a US-based evangelical charity that runs shelters for homeless children, providing a variety of services to people of all races, ethnicities and religions.
It’s been accused of funding the trafficking of women for sexual exploitation and trafficking for commercial sex.
Sanger has denied any wrongdoing and the charity has denied all accusations.SOS has also denied the allegations and said it has taken legal action against the organisation.
The organisation has been at the centre of several scandals in recent years.
In 2015, a former employee of the organisation was convicted of sex trafficking, including having sex with a 14-year-old girl and having sex at her home.
A year earlier, an Sanger employee was arrested for having sex in his car.
In 2017, an assistant pastor of the church was charged with sexual abuse of children.
Last month, Sanger announced the retirement of two senior employees and had announced a $1.3m (£876,000) fund to help with the ongoing legal proceedings.
The new charity is the result of the resignation of former director of outreach and communications Michael McKeown and director of external relations and media affairs, Kristina A. Smith.