Plenty of big services will just give cops info if they ask for it. It's legal. Any company or individual can just offer up evidence against you and that's fine, but big companies will have policies that do not require warrants.
Despite this atrocious anti-privacy stance, cops STILL clear around half of violent crimes, and that's only in states with rather good police forces, usually involving higher requirements than "A pulse" and long training in a police Academy. Other states get as low as 10% of crimes actually solved.
When you've built a panopticon and cops STILL can't solve cases, it's time to stop giving up rights and fix the cops.