I think the answers to some of the "unanswered" questions are probably fairly obvious.
Ray likely dumped his suit. He probably panicked that there was SOMEBODY'S blood on it. Testimony showed he was involved in trying to break up the fight, he put his hands on people. Anybody's blood / DNA could have been on it. He saw his life flashing before his eyes because of other people's actions, and ditched it.
Nobody was convicted because the two who in all probability did it were put on trial next to an innocent man (innocent of the "murder" charge), the prosecution was handled horribly, and the D.A.'s office introduced so much doubt in their
terrible handling of Ray's role that it destroyed the credibility of testimony against the other two.
I'll fully admit, if he played for the Steelers or ANY other team... I wouldn't have watched the online stream of the trial, and probably wouldn't have read 1/20th of the articles about it. But my opinion would then be UNINFORMED.

Like most fans outside of Baltimore likely are. Which is why it's a responsibility of the journalists to INFORM their audience. That's what doesn't happen enough. There is no emphasis on informing and painting a bigger picture, it's just about driving up site traffic and social network buzz. Sensationalism plays much better than fact for that purpose. And it's why I have a hard time respecting most modern journalists today...