Autistic individuals are more vulnerable to sexual abuse (SA) and rape and serious sexual offences (RaSSO) than non-autistic individuals, yet the extent to which factors predict this is unclear. Also, autistic victim-survivors’ experiences with the criminal justice system (CJS) are unknown. Aims: identify factors predicting autistic people’s vulnerability to RaSSO/SA; understand the experiences of autistic victim-survivors from multiple perspectives; and co-produce materials to improve CJS outcomes. Methods: a review identifying factors contributing to RaSSO in autistic individuals; a comparison of abuse recognition between autistic and non-autistic individuals; interviews with autistic victim-survivors, their parents/supporters, and CJS professionals; co-production to develop materials.