I honestly don't think that he's Akai. (But I want to beleave it so badly! T^T)
Just think about how he died, they even had his fingerprints checked. Besides, there is no time to escape, and if he somehow managed to escape, then why was his body still there? This is solid proof!
There is one thing that bugs me though. How were they able to get his fingerprints if his body was burned? Because he put his hand in his pocket! Why did he do that? Was it a coincidence? Did he do it on purpose so that they would be able to get his fingerprints after his death?? And if that was the case, why did he do that? Did he do that so that nobody would belive that he was still alive, and focus on bringing down the org? Did he really sacrefise himself???
I think it's a posebility. If he sacrefised himself, it would only make sence why no one would belive it. (In the real world) Because it's never happened before in the series!
Someone is bound to get killed anyways. This isn't childs play!
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But if he isn't Akai.. then who on earth is he??? I don't know!!>o<
But wouldn't it be nice if it was a new character? A detective, just like Shinichi, Hakuba and Heiji!
That would excplain allot. And maybe, he's a former BO member! That would explain why Haibara reacts to him, even though he hasn't done anything to harm her.
And if he knew this Bourbon ir even was a relative to him/her it would really sound like something Gosho would do. I do belive that he will play a big (or not so big) role in the plot.