This kind of email investigation can actually return a picture of the person behind the email address. So as you can see that it is possible to trace an email and locate or identify the sender even if the email address has been deactivated or deleted.
How To Retrieve Deleted Emails From Gmail
Recover Permanently Deleted Emails from Gmail
There are a few ways to delete Gmail and all of your data.
1) You can go to the “Settings” tab in your Gmail account, then select “Delete your account or services” and follow the instructions.
2) You can also use the “Delete specific messages” option to delete individual emails.
3) The last way is to use the “Empty Trash” button on the toolbar at the top of your inbox.
Yes, guerrilla mail can be traced. If you use a mailing service like USPS or FedEx to send your package, it will be tracked and the recipient will know who sent it. If you use a carrier like UPS or DHL, they provide tracking numbers and the recipient will know who sent it.
Yes, browsing history can be recovered. The only way to avoid this would be to use a different browser or delete your browsing history when you are not using it.
Yes, they can.
The police can tap your phone if you are suspected of committing a crime. The police will need to get a court order to be allowed to do this.
Yes, police can track email accounts. There are a couple of ways they can do this. One way would be to subpoena the email provider and ask for all data that has been sent or received from that account. Another way would be to request the IP address that was used when accessing the email account and then use it to find out who is using that IP address.