This is the moment armed cops burst into a condominium to arrest a stepfather accused of keeping his stepdaughter imprisoned as a sex slave for 22 years and selling her to other men as well.

The 29-year-old woman, who has not been named, fled to police in Araucaria, a city in the southern Brazilian state of Parana, on Tuesday, September 16.

She had told the 51-year-old suspect, also not named, she needed to take her three children to a health clinic, but instead went directly to a Civil Police station.

Police chief Eduardo Kruger said she had been abused since the age of seven, and at 15 became pregnant by the man after he separated from her mother and forced her into a relationship.

Investigators said she had three children with him and was also forced to have sex with other men, with the assaults reportedly recorded on video.