Tons of people seem to think Adnan (the ex boyfriend) is innocent, but I’m convinced he’s guilty. I feel he manipulated the host through their phone calls which helped convince millions of people that he’s innocent.
If you use Occam’s razor to shave off all the outside noise and unnecessary theories, the case is rather simple. Girlfriend breaks up with controlling boyfriend, girlfriend immediately gets new boyfriend, ex boyfriend gets embarrassed/enraged and kills her, ex boyfriend enlists drug dealer friend to help dispose of the body, drug dealer friend rats out ex boyfriend to save himself. This theory lines up with timelines and phone records. Case closed.