The Crown Prosecution Service took over the criminal proceedings, but Ms de Freitas was found dead on April 7 last year, three days before the start of her trial at Southwark Crown Court.
Her death triggered an outcry from anti-rape campaigners, but the Director of Public Prosecutions, Alison Saunders defended the prosecution.
Following an internal investigation, she said: “The evidence was strong and having considered it in light of all of our knowledge and guidance on prosecuting sexual offences and allegedly false rape claims, it is clear there was sufficient evidence for a realistic prospect of conviction for perverting the course of justice.
“This was evidence including text messages and CCTV footage that directly contradicted the account Ms de Freitas gave to the police. I am satisfied that the decision-making in this case was correct.”