I'm guessing this is in Australia, since I seem to remember Apolllo lives there. I know absolutely nothing about the criminal justice system down under, but this could just as easily have happened in America. I have VERY little faith in the American "justice" system (and I'm studying to be a lawyer). I hope he has an option to appeal, and that there is a reasonable posibility of success upon appeal (that is, of course, assuming that he is innocent as you say).
I have a question...I hope it's not insensitive of me to deviate from the subject as I'm sure this is a devastating ordeal for you and your family, but is gay marriage legal in Australia (or wherever you live)? I ask because you refer to him as your brother-in-law, which would imply that he is married to one of your siblings, which is impossible in America (with a very few exceptions), unless of course he's married to a sister, but that would be kind of an unfulfilling relationship for a gay man.