> If you refuse to let investigators in to dust for fingerprints

…then they will just go get a warrant to do it.

Refer back to my original comment for what's likely to happen after they do that: https://news.ycombinator.com/item?id=49367459

I'm not saying it never happens. I'm just saying it's an uphill task for the prosecution. Prosecutors like easy wins.

Everything else being equal, they'd rather prosecute crimes where the alleged victim cooperates. With obvious exceptions like homicide, or serious assault where the victim is unable to cooperate. Or where the victim is being coerced into not testifying - even here without other witnesses or corroborating evidence there's little possibility of a conviction.