The "legal" model that many feminists appear to want used in cases of alleged sexual assault is already in existence. It is used by Canada's federal Human Rights Commission.  If you are charged with an offense by the Commission, you are assumed guilty and required to prove your innocence.  The full power of the Commission is used against the accused and in support of the complainant making it extremely difficult to prove your innocence.  None of the laws  to protect the rights of the accused governing the court system apply in the Commission's proceedings.