I don’t see that as an example, either-might as well use that Guns and Roses tune-”I Used to Love Her-but I had to kill her”-and buried her in the backyard. I don’t recall any of those band members having been arrested for killing someone, or burying them in the backyard-makes no sense...
A lot of those Rap “artists” are real criminals-but I don’t think they are confessing the crimes in the lyrics-the intent maybe...
If you read the exceptions in paragraph four above it lists every rational reason to bring an “artists” lyrics into a trial.
I can’t believe that any lawyer has brought song lyrics into a trial for any other reasons and if they did it would be tossed out upon objection of irrelevance by the opposing legal team.
FWIW, I heard the song is about a dog.