action;
[He followed McCoy aboard the ship, saying nothing until the doctor mentioned the blood. If that were a threat, it'd just be slightly amusing to him.]
You may, so you know it's genuine. [And because he didn't really have any needles laying around, nor had he really thought of doing it himself when he knew McCoy could.] After I see the torpedoes. [After he saw if they were his, if his crew was here. If they weren't--a possibility he was forced to consider--he would just ask for whatever torpedoes the Enterprise had and go with his original plan. Much as he tried to not let himself hope, the farther into the ship they got, the more impossible that became.
He forced himself not to walk ahead of McCoy, even as he realized exactly where the other was heading. He had to see, to know before he let McCoy anywhere near his blood. He didn't care about the doctor's platitudes of being Southern and a "man of his word," none of that would be enough to convince him to trust McCoy.]