but the reality is there would be no investigation if not for Rep. Murtha,
The investigation was well underway before Murtha used information he got in a briefing from the Marine Corps to wrongly accuse Marines of "killing in cold blood." He had nothing to do with prompting any of the investigations.

I don't understand why anyone would object to the principle of innocent until proven guilty. If these Marines are charged, they deserve an opportunity to make their case.