What really happened!

After Sayid confronted the man who calls himself Henry Gale, he locked him away until it was decided what they would do with him. By the time Michael returned the following day, things were just beginning to heat up. Jack, had in a way, abandoned the situation, because he didn't know what to believe anymore. Ana Lucia took an interest in the captured Other because she had past experience with their people, but when he tried to kill her, she was having her own thoughts of murder! While sitting outside the safe, Ana shifted the gun from her left back to her right hand, over and over again. When Michael came into the room he questioned why she was holding a gun. He hadn't a clue what had been going on the two weeks he was gone. She explained how they had caught one of "the Others" and she was going to kill him, but didn't think she could bring herself to do it, after accidentally killing Shannon. Michael, enraged because they still have his son, tells her that he'll do it for her. Ana hands Michael the gun and he asks her for the combination to the safe, a split second later, after he whispers "I'm sorry" under his breath, he turns her own gun on her and shoots to kill! Not even two seconds later Libby accidentally walks in on the situation and becomes the second victim at Michael's hand! Oddly enough, Michael then opens the safe and shoots himself in the shoulder in order for Henry to be able to escape!
Later, when Michael is asked to explain what happened, he seems very nervous and determined more than ever to get his son back. It doesn't even seem to effect him that two people were murdered in front of him and he nearly could have been killed as well. He suggests that if they leave now, in a small group, it's the best chance they have of rescuing Walt. Jack, Kate, Sawyer, and Hurley tell him to slow down, they must bury their friends first. Michael gives in, and tells Jack that when they do go after Walt, it has to be the group he said, no more, no less. When Michael is later outside getting some fresh air, he pulls a piece of paper from his pocket and burns it to ashes!