Answer
Facebook gives you the option to deactivate your account or delete it for good. The latter will ensure that all of your data is erased from Facebook’s servers, with the exception of anonymous log files.
Difference Between Deactivating and Deleting Facebook Account Explained 2017
What you need to know before you delete your FB account
Click the downward-facing arrow at the top right corner of the page to go to the Settings page. Click the Your Facebook Information link under Security and Login, then click Delete Your Account and Information.
The easiest method to erase Facebook postings is to do it in bulk. To begin, go to your Facebook account and select the posts you wish to remove. Select Manage Posts from your profile photo, then choose All from the drop-down menu. You may start deleting in bulk by clicking Choose All after selecting your posts.
Go to Settings and Privacy, choose Limit Past Posts from the left-hand menu, and then click on Limit Past Posts. All of your public postings are hidden from the Public and classified as Friends only.
No, the cops can contact Facebook directly. They don’t need to try to log into that account on their own. They have a screengrab of the username, date/time, and specific comment/conversation in question. That’s all they need.
“When you delete your account, all of the user-generated content is usually erased (although there are certain exceptions), but all log data is saved – permanently. “The stored logs will not include your name.”
To remove messages on Messenger from both sides, tap the message to highlight it, then choose “More…” and “Remove”. What is this? After you’ve tapped on “Unsend,” the message will be removed from your side of the chat and the receiver’s side of the chat.