This is Alec Baldwdins' Twitter account:
The tweet was 4 years ago. He has deleted his account multiple times. Try this link see where it leads and it is authenticated (bluecheck).
https://twitter.com/AlecBaldwln____
https://nypost.com/2021/10/22/alec-baldwin-haunted-over-old-tweet-about-fatal-cop-shooting/
https://twitter.com/AlecBaldwln____
Well the link dropped the 3 underscores you would have to add on again