Prostitution and human trafficking

I am quite concerned about my neighbour who seems to bring in ladies from all across East Africa and the far east and keeps them in his house. I see men come in and out all the time. I bumped into one of the ladies at the kiosk where she was not supposed to visit but could do so as the owner was away. She told me that the owner promised jobs to them only to end up being exploited in Dar. Is this not an offence?
YU, Dar

Section 4 of the Anti Trafficking in Person Act 2008 states that a person commits an offence of trafficking in person if that person recruits, transports, transfers, harbours, provides or receives a person by means, including those done under the pretext of domestic overseas employment, training or apprenticeship, for the purpose of prostitution, pornography, sexual exploitation, forced labour, slavery, involuntary servitude or debt bondage.

The description you provided quite clearly falls under the above and this is a serious offence that can fetch the owner upto 20 years imprisonment or a fine or both.