Camp Pendleton hosted a free mixed martial arts show Friday night. The card included a number of former Marines, including Kenneth Alexander, who lost his fight by techinical knockout in the second round. Turns out the loss may be the least of his problems right now. A Marine Corps Times reader disputed published reports that said Alexander was a sniper, that he had deployed twice to Iraq and Afghanistan, and that he had served with the Special Forces. So Marine Corps Times spoke to the fighter earlier this week, and Alexander acknowledged that none of that was true, that he’d…