During her first day of testimony, Ms. Ventura described a relationship with Mr. Combs that was controlling and included physical abuse.

Combs faces five criminal counts: one count of racketeering conspiracy; two counts of sex trafficking by force, fraud or coercion; and two counts of transportation to engage in prostitution.

Prosecutors have said Combs and his inner circle used threats, violence, drugs, bribery, arson, kidnapping and lies to coerce Ventura and another woman into extended sexual performances known as “Frea...