Of coarse[sic] so many documents were leaked that sooner or later the military will find someone who was killed and also mentioned somewhere in the documents.
Coincidental and inevitable.
Let's look at this in a different direction: here we have an (informant?) to the US military, presumably native to the area, who must have chosen sides, and his side was against the Taliban. He knew what the consequences of his actions could be, and instead of sticking his head in the sand and saying nothing to nobody, he stuck up for what he believed in. It's unfortunate that he died, but I wonder how many American Revolutionary War vets would have done the exact same thing. It's truly the personification of the Patrick Henry quote, "Give me Liberty, or give me death!"
The information release doesn't change the fact that he made his choice knowing the possible consequences. It only puts a face on the faceless Afghans who are fighting against the Taliban.
What the police department did about the recording is very wrong but that's a separate issue.
And that "separate issue" would be the issue at hand. The defendant has everything coming to him regarding speeding and/or reckless driving citations, but that's not why the ACLU is representing him, nor why he's facing 16 years in jail. In that respect, IMHO he is an innocent victim.
Two wrights don't make a rong, they make an airplane. Or bicycles.