Members of the Hinduja family—elders Prakash and Kamal Hinduja, their son Ajay and his wife Namrata—are facing criminal charges of human trafficking and their trial began Monday, Bloomberg reported, days after they settled a civil case brought by their staff over the alleged worker exploitation.

Details of the settlement were not disclosed but the parties reached an agreement Friday, six years after the civil suit was filed, over allegations they paid their staff, including childcare workers, a fraction of local wages and forced them to work illegally long hours.

The criminal charges center around claims the Hindujas illegally brought the staff in and out of Switzerland after having confiscated their passports, that servants weren't allowed to leave the employer's house without permission and that they were paid for their work in India, meaning they had no Swiss money and therefore little freedom when visiting the country, according to Bloomberg.

Yael Hayat, attorney for Ajay Hinduja, reportedly said in court that claims of an 18-hour work day were an exaggeration and that the salaries, said to be below $8 per day, "can’t simply be reduced to what they were paid in cash" because staff food and lodging were paid for by the family.

Prosecutors are pushing for years-long prison sentences for all four Hinduja family members and want to demand a compensation fund worth millions of dollars be established for staff members.

Lawyers for the Hinduja family pushed back on the claims, saying the family members themselves were not involved in the hiring or day-to-day handling of staff and one attorney in March said the criminal charges were brought based on a “fantasized” version of events.

Yael Hayat, a lawyer for the family, did not immediately respond to Forbes’ request for comment Monday.