Follow the latest from Sean "Diddy" Combs' sex trafficking trial in N.Y. as Cassie Ventura testifies against the artist for the second day in a row.

As music mogul Sean "Diddy" Combs' federal trial is set to begin, Dateline explores the allegations against him, including charges of racketeering and sex trafficking.

Sean “Diddy” Combs admitted he was a “little nervous” in the run-up to his criminal trial, as the hip-hop mogul looked into the eyes of the potential jurors who will render a verdict on the sex trafficking and racketeering charges against him.

The singer, whose real name is Casandra Ventura, became emotional at one point during her first day of testimony, saying she didn’t want to disappoint Sean “Diddy” Combs.