I mean, this was one of the more prevalent theories out there back then. And honestly, if you compare it to the rumors or the accounts we got of different testimonies...this story is the one that makes the most sense.
EDIT: Also, at the end of the trial when Tory's team had the choice to call their last witness and didn't call him, that was one of the worst decisions I've ever seen in a trial. I think tory was trying to protect the best friend on some love shyt as well as some streetcode shyt. But both the girl and the streets ended up leaving him hanging...