It may seem small, but that fundamental ability isn’t usually afforded to Black characters, including the other ones in Scream 2. Maureen (Jada Pinkett Smith), despite loathing the fact that ...
so he filmed Maureen's affairs and showed them to Billy. He then gave Billy the idea of carrying out the first Ghostface killings, which in turn led to his mother's involvement in Scream 2.
It all comes during the big reveal at the end of Scream 2, when Billy and Stu tell Sidney that they killed Maureen one year ago. Billy and Stu are killed, and Cotton Weary is exonerated.