Thriller read in around 2019-2022, son is released from prison after being convicted of killing girlfriend, POV is his from his mothers perspective and she has personal issues with the dead gfs mom, mom tries to figure out who actually did it. Spoiler.

[Myah]

lots of scenes where the mom visits her son in jail and there’s like true crime groups and protest gatherings about the son getting out of jail and the real murdered is later uncovered and i think it was actually the girlfriends mom

[Kris]

Myah, what appears to be the murder weapon and where was the girlfriend's body found?

How old is her son?
Main characters' jobs?
Is this a detective/ police officer series?

Story's time period and location/ country?

[Kris]

The Good Son by Jacquelyn Mitchard?

Google Books preview: https://books.google.com/books?id=ed8...
There are different cover images.

Google search of Goodreads:
site:goodreads.com "thriller" "her son" "released from prison" murdering "his girlfriend"