Couple of things this anon picked up on in this article.
1)she was unusually honest and straightforward" - Is she normally a liar?
2)"despite our living conditions, Brett and I did not socialize beyond the first few days of freshman year". - How can you speak on his character then?
3)"Based on my time with Brett, I believe that he and his social circle were capable of the acions." - Really? You stated earlier that you didn't socialize with him.