I've been on a number of twitter threads about this today. It's outrageous. Not least because, as number of posters have pointed out here, there's no real description or explanation of what the data is used for or how much of the data the police (and defence attorneys) can access.
For example, I hate it, but I can see how if the perpetrator claims that the victim liked it and sent text messages to that effect subsequently, it might be considered relevant information, with a desire to check on the victim and perpetrator's phone by police/prosecuting attorneys to see if this is true. But that's a very slim, specific use of data in a very specific situation.
And the problem is that we all know that when the phone data is downloaded and there is, for example, a history of the woman sexting with multiple men, then immediately it will be assumed that she is to blame for her rape.
It's also so frustrating that the main reason for the phone thing appears to be to check that the woman isn't lying. Because obviously, women lie about being raped ALL THE TIME. [sarcasm alert].
I have a little bit of sympathy for police wanting specific data to prove/disprove specific facts - eg location, post-incident commentary etc. But the threatening tone, the scope of what they can do and years and years of experience of how women who are raped are blamed make this completely unpalatable.