Tonight the bombshell court testimony is Sean Combs' former girlfriend accuses him of abusive and explicit acts.

Cassie Ventura's star witness in the case against the music mogul accused Diddy of years of sexual and physical abuse in graphic detail, including a now infamous assault at a hotel.

She laid out in graphic detail being forced to participate in, quote, freak-off parties.

One she said lasted four days, Diddy pleading not guilty to all five counts.

President Trump on the world stage in Saudi Arabia meeting with controversial ally,

Crown Prince Mohammed bin Salman.

His trip overshadowed by ethical questions over his plans to accept a 747 from the

Qatari royal family, all as the president announces billions in development deals.

The Menendez brothers appearing via video in court in their odyssey to be freed from

prison. The flooding emergency in Western Maryland, a school evacuated. Kim Kardashian speaking out

in court saying she thought she was going to die when robbers stole $10 million in jewels

from her. And hoop dreams, the WNBA coach making history, her inspiring mission after going from a walk-on

to the big boss.

This is NBC Nightly News with Lester Holt.

Good evening and welcome.

He has been one of the most powerful figures in entertainment, rapper, record producer Sean Diddy Combs.

Tonight is music empire and his very freedom, potentially at stake as his trial on federal sex trafficking charges turns to what the prosecution calls its star witness.

Combs's former girlfriend, Cassie Ventura, getting to the

heart of the case, describing Combs as a scary and violent person who controlled her appearance and

career, her graphic testimony painting a lurid picture of sexual and physical abuse, fueled by

drugs. We want to warn you some of the details are

disturbing. Chloe Malas was in the courtroom. Eight months pregnant Cassie Ventura on the stand today

...