What could possibly go wrong?
Police had arrested the wrong man based on location data obtained from Google and the fact that a white Honda was spotted at the crime scene. The case against Molina quickly fell apart, and he was released from jail six days later. Prosecutors never pursued charges against Molina, yet the highly publicized arrest cost him his job, his car, and his reputation.
https://www.phoenixnewtimes.com/news/google-geofence-location-data-avondale-wrongful-arrest-molina-gaeta-11426374
Naīve people believe that the police have some interest in establishing the truth. Most times they do not, they just want to "get a result". People also foolishly believe "It could never happen to me, just to criminal types". Consider where you are located at this moment; if a serious crime occurred within 100 meters of where you are now, could you prove you had nothing to do with it? (Note, you don't have an
alibi [lit.
elsewhere], your phone has placed you at the crime scene.)
Last year a murder happened 40-50 metres from where I am sitting at around this time of day. The police had no reason to suspect me, I just happen to live nearby, and they never talked to me about it because the suspects were obvious and it happened where there was CCTV coverage. Had that not been the case and they'd used a geo-fenced warrant (or, this being the UK, probably obtained phone company records with no court involvement at all) how safe would I have been from coming under unwelcome and unjustified scrutiny, possibly at the extreme a wrongful conviction? I suspect less safe than many people would think - I've worked with the police, been in major incident rooms and heard the chatter, it's not encouraging. In the mind of PC Plod there's a world of difference between "he has an address nearby" and "digital forensics can place him in the vicinity of the crime". Under those circumstances it doesn't matter to PC Plod that in theory it's
his job to prove your involvement, he''ll treat you as a "person of interest" until
you can prove that you had nothing to do with it.