This is On Trial, a special series from Dateline True Crime Weekly, bringing you daily coverage from the Sean Combs racketeering trial.

He has pleaded not guilty to all the charges against him. I'm Andrea Canning, and it's Thursday, May 29th.

Just a heads up in this episode, we're going to be talking about some graphic details and harrowing subject matter.

Today, the prosecution called a woman to the stand, they allege, is another victim of Combs.

We do not know her name. She is testifying under a pseudonym, which is Mia.

And at times, she seemed so overwhelmed by what she was telling the jury that she started

to hyperventilate.

Like Cassie Ventura, Mia alleges that Combs sexually assaulted her.

She also described what it was like working for him, accusing Combs of keeping her awake

for literally days at a time and living in fear.

Those allegations could put him directly in the crosshairs of the RICO statute.

NBC news correspondent Chloe Malas is back outside of the federal courthouse to tell us more.

Hey, Chloe.

Hey, Andrea.

Okay, so big day in court today.

Before Mia started her testimony, the judge gave a clear instruction to the jury not to put any weight on the fact that she was testifying using a pseudonym.

Do we know why exactly she has chosen not to use her name?

We know based on a letter that prosecutors sent the judge in April Andrea that she is just so fearful as to her identity

getting out there that it could hurt her with her job professionally. It would just cause irreparable

damage. We were mandated by the judge not to even describe her appearance. So I can't even tell

you what she was wearing. I can't tell you the color of her

hair, what she looked like. I mean, we have to be really, really careful in abiding by these rules.

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