He's clearly trying to be friendly, but the uniform makes her disinclined to trust him. Maybe it's some sort of trick. Or maybe he thinks he's telling the truth, but he'll change his mind in a hurry once he finds out what she is.

Either way, she needs to reassure herself that he's unarmed. Melanie edges out from around the corner, then slowly makes her way toward him, ready to bolt if he makes any sudden moves. But he doesn't, and she comes to an uneasy halt a few paces away. "I'm going to check for weapons," she explains, eyes already seeking out any tell-tale bulges where a holster might be hidden. "Okay?"