California restricts use of rap lyrics in criminal trials after Gov. Newsom signs bill
California restricts use of rap lyrics in criminal trials after Gov. Newsom signs bill

www.nbcnews.com
California restricts use of rap lyrics in criminal trials after Gov. Newsom signs bill

Key point: "As the sole basis"
So to any fearmongers one would encounter: If the person was already an active suspect and releases a song "How I did it," that would qualify. Using the song "How I did it" to retroactively build a case would not.