According to reports, an investigation is underway into T.I. and Tiny for sexual assault and drugging. 

The Daily Beast confirms that the investigation is focused on the accusations of an accuser who says she was assaulted in 2005. The woman spoke with police virtually back in April, and police say an investigation is active. Tyrone Blackburn, the attorney representing the woman and dozens of more accusers, claims the hip-hop couple subjected the alleged victims to drugging, kidnapping, rape, sex trafficking, and intimidation.

The attorney representing T.I. and Tiny told the local Atlanta Fox affiliate that they "are still waiting for the accusers to reveal themselves publicly." 

Source: thedailybeast.com