> A high risk Registered Sex Offender (RSO) was placed on the register for raping a 16 year old female, served nine years imprisonment and is now monitored by Corrections via two ankle bracelets whilst out on parole. Victoria Police received intel that he was breaching his RSO and parole conditions by contacting a number of females typically between 13 and 17 years of age. Enquiries showed that he was contacting these females and offering them drugs in return for sexual favours. The suspect was arrested and his mobile phone was seized but despite legislative requirements he refused to provide his passcode. Due to an inability to access his phone as well as the fact that he used encrypted communication methods such as Snapchat and Facebook Messenger, Victoria Police was unable to access evidence which would have enabled them to secure a successful prosecution and identify further victims and offences. These are high victim impact crimes that are being hindered by the inability of law enforcement to access encrypted communications.
The limited information reveals they identified some targets, which means they would know (some of) his Facebook and Snapchat account names.
While the content of messages can be encrypted, the connection graph is not, so why couldn't Victorian Police request details of accounts the suspect's account had communicated with and request the parents of those users provide endpoint access to the encrypted chat history?