Howdy! Sorry to hear about the troubles you've been having.

Unfortunately, we here on the Chrome team cannot generally help with issues of this nature; we can only fix bugs in Chrome, and this doesn't sound like a problem with Chrome specifically.

In general, yes, you should not allow anyone physical access to your computing devices because there are many different ways that a malicious person can take control of the device if you allow them to use it; we summarize some of those risks here: https://chromium.googlesource.com/chromium/src/+/master/docs/security/faq.md#Why-arent-physically_local-attacks-in-Chromes-threat-model

In terms of recovery, most modern devices (phones/chromebooks/iOS/Windows10 devices) support a "Powerwash" or "Reset to factory settings" feature that will allow you to wipe everything off the device to start fresh; this option is usually in the "Settings" app.

If you are under "24 hour surveillance", I'm afraid that technical measures alone are unlikely to help you. You should contact your local law enforcement authorities who are more likely to be able to get you the help you need.

Best wishes!

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot