The Crown Prosecution Service has defended its decision not to pursue many of the complaints against serial attacker John Worboys.
Many of the complaints “did not pass the evidential test”, the CPS said.
Sir Keir Starmer, who was director of public prosecutions at the time of Worboys’ trial, is also facing questions over the case.
The CPS said Sir Keir did not have “any involvement in the decision making behind this case”.
Worboys, who became known as the “black cab rapist”, was jailed indefinitely in 2009, with a minimum term of eight years, for drugging and sexually assaulting female passengers.
The chairman of the Parole Board is to face questions from MPs over the decision to release him soon.
One victim, whose identity is protected, told Sky News: “I feel shaken up and very upset at the decision.”
Worboys was found guilty of 19 charges of drugging and sexually assaulting 12 women passengers, in one case raping a woman.
But police said in 2010 that his alleged victims numbered 102 after more people came forward following his trial and conviction.
In a statement, the CPS said during the initial police investigation it received files relating to 83 separate complainants against Worboys but 69 of those “did not pass the evidential test”.
Ahead of Worboys’ trial, prosecutors considered charges related to another three complainants that had passed the evidential test but it was decided there were “sufficient counts on the indictment”.
By the time of Worboys’ convictions in March 2009, a further 19 complainants had come forward.
The CPS advised police that only rape allegations should be referred to prosecutors as it was “unlikely” to be in the public interest to prosecute Worboys over claims of sexual assault or administering a substance with intent “because of the maximum sentence available to the court”.
Police submitted a file to the CPS in respect of one complainant who alleged a sexual assault but it “did not pass the evidential test”, the CPS said.