Ah, shock. He looked confused as she told him to stay away and go back to his people, seeing if he could salvage this at all. "Sarah? What..."
But then she asked if he'd killed anyone, and he knew she'd never believe him any more. So he just shrugged instead. "I haven't killed anyone on this station." The 'yet' lingered, unspoken.
He stepped towards her as he spoke. "So, what do we do now? I'm here because I just don't want to die. My station, which you're on, by the way, has no real food. The oxygen generators are... glitchy. At best. Our water is bad. I saw a way out, and I took it. Are you going to hand me over to Maryanne now? Because I didn't want to die? Because I don't want anyone else on my station to die?"