With the explanation from Rob that the killer was a woman, the other man's reaction to her made a heck of a lot more sense. Anna did her best to manage a tight smile toward the man in the fedora.
"Anna Milton. A friend of Mary's," she added the explanation. "More specifically, dating a friend of the family's."
She carefully avoided looking at Rob as she said that. Whatever Castiel might have sensed, Rob didn't seem to want his parentage known and it wasn't their business at the moment.
She froze as she heard the sound of a gunshot somewhere else in the building. She looked at Castiel, a little bit of fear in her eyes.
"Go. I'll help with this one, assuming he'll have my help," she said with a strained smile at the man whose name she hadn't caught yet.