Here are some of the final posts from LAScanner on X, run by Jack Quillin, who is now apparently in the process of turning himself in. His account, LAScanner, would pinpoint ICE raids, and tell people where they were happening.
He essentially aided undocumented individuals (and leftists who oppose ICE), posting locations of ICE raids as soon as he became aware of them. Jack would receive DMs from his followers and then post the locations they gave him. It also sounds like he was using a police scanner to gather information.
And now, he's turning himself in.

He's deactivated the account:
People are now saying Jack was already a felon, and it seems this may have been the tweet that essentially doxxed Jack into deactivating the account and turning himself in.
Bro was a stalker. No wonder he wanted to keep track of ICE!
Jack's reply:
Wild times we live in, people!
P.S. Now check out our latest video 👇