[1] https://www.youtube.com/watch?v=mWISiHcGoNg
https://genius.com/21-savage-red-opps-lyrics
Overall there are probably enough anti-police punk songs to fill an entire genre of music.
Here are some of the prominent examples I could think of that beyond hating cops, are more directed threats:
https://genius.com/Terrorgruppe-all-comic-heroes-are-fascist...
"All cops are bastard, barbecue their dicks"
https://genius.com/The-dicks-anti-klan-part-one-lyrics
“I see that you’re a policeman, I know you’re in the Ku Klux Klan.”
https://genius.com/Mdc-lets-kill-all-the-cops-lyrics
"Lets kill all the cops and throw them in bags"
https://genius.com/Choking-victim-crack-rock-steady-lyrics
"Are you ready to stop the rotten blue menace? Let’s go kill us a cop"
[1] https://www.youtube.com/watch?v=mWISiHcGoNg