Though most users delete chat history due to a myriad of reasons, one of the primary one's out of which is privacy concerns. However, the culprits behind misuse of social media platforms like Facebook use deletion of chat history as their eventual escape. Nevertheless wiping off crucial messages, indecent media, etc., doesn't always mean that you can get away with your wrongdoings. Facebook provides an unearthed tool, i.e., Archive. When the deletion of one's Facebook messages is carried out for reasons whatsoever, it is automatically sent into the archived folder. Which means that the data is not permanently lost yet. And retrieval of those messages and media files is still possible for solving criminal cases and prevent similar crime from taking place in the future.
Login to your Facebook Account by providig the respective Email ID and Password.
Go to Account Settings in the top right corner of the window.
Click on Download a copy of your Facebook data.
Now in next pop up window, click on Start My Archive.
Now Request My Download dialog box will open
Click on Start My Archive again to start the gathering process.
Now in next window: -
Now in next pop up window: -
Now your Archive will download to your computer.