Jurors heard from a dozen witnesses during a second week of testimony in the Sean “Diddy” Combs trial as prosecutors sought to prove sex trafficking and racketeering. Rapper and actor Kid Cudi was on the witness stand.

Kid Cudi — the rapper who had a brief relationship with Cassie Ventura, Combs’ former girlfriend — is expected to testify after Kaplan, prosecutors said yesterday.

Gerard Gannon, a special agent with Homeland Security Investigations, said a Gucci bag found in a closet contained an assortment of pills, white powder, a “crystal rock-like substance,” a plastic str...