(CNN) — A former employee of Sean “Diddy” Combs took center stage in his federal criminal trial Thursday and testified that he physically and sexually assaulted her on multiple occasions during the time she worked for him.

The employee, who is testifying under the pseudonym “Mia,” is expected to return to the stand on Friday to end the third week of testimony. The prosecution has said their case is expected to last about five weeks.

Combs has to charges of racketeering conspiracy, sex trafficking and transportation to engage in prostitution. If convicted, he could face a sentence of up to life in prison.

Prosecutors have said Combs and some in his inner circle acted as a criminal enterprise and used threats, violence, drugs, bribery, arson, kidnapping and lies to coerce his ex-girlfrie

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