The next day, Operation: Lion's Den can commence. 

Two absolutely normal-looking girls knock at the Argent's door. Except that one of them has white-hair, but that is likely just a fashion statement.

(Vera's wings are hidden beneath a heavy coat. Vii's are hidden magically.)

A woman answers the door. 

"Hello. Can I help you?"

"Hi! We are from," Vera names something legitimate-sounding, "we are conducting a survey on gun control laws. Would you mind a few minutes of your time?"

"Of course, come in. Chris! We have guests."

While she sets about making coffee, he comes downstairs. 

"Hello. What's this about?"

"Gun control laws."

"Sit down. How do you like your coffee?" 

"Black," they say at same time and Vera continues, "but only if it's no trouble."

"Are you the only two adults in the house?" Vii asks.

"Yes. Is that important?" 

"For surveying purposes."

"My sister-in-law is currently staying with us, but she's not here now. Otherwise, it's just me and my husband."

"Good," Vera shifts posture, it is pretty clear this is meaningful while also not being alarming, she looks very diplomatic somehow, "Sorry for the subterfuge, but we need to talk to you two about something very important and that sounded like the most diplomatic way to get in touch."

"What is it we can actually do for you?"

"Talk about the alpha attacks in town. We believe it is a direct consequence to the Hale fire years ago."

"The alpha has been killing people who don't seem to share any connections to us, each other, or the supernatural. I take it you have a theory?"

"Most of our sources are... complicated. But one of the people involved told me while drunk that Kate paid him to help in the arson."

"She organized it?"

"You may have misunderstood things. I can't see why you thought a drunk was a good source."

"We are aware of that problem and is one reason why we are here," Vera says calmly, "but understand it is worrying and we have noticed connections between the arson and the alpha victims."

"We should hear them out, Chris. Go on."

They present their evidence, including the bit about Kate and the chemistry teacher. It isn't exactly suspicious, but puzzling how they acquire it, but they aren't volunteering it on their own volition. "We understand that it isn't definitive evidence, but the original investigation was obviously hindered by lack of a full picture."

"If one of our own has been acting unilaterally, then we have work to do."

"You can't tell me you believe them."

"After what the Hale boy did? I expect she would. She's always been a loose cannon. Thank you, for telling us. You were hoping to bring her to justice, weren't you."