"What do you want me to do?"

"I'm sure Scott has a use for him, but I imagine he'll take your suggestions, Ellie."

"I don't think he's worth keeping."

"Scott is, let's say, averse to killing his enemies. If one of us does it, and we don't tell him who, he'll forgive us."

He turns into a coyote. 

The coyote and Ellie are abruptly a hundred feet in the air.

"The long way out of town it is." She brings a bubble of air with them as they ascend to the edge of the atmosphere.

The coyote is entirely unable to resist her powers, of course. 

He growls.

"I can respect your tenacity, if nothing else. Farewell." And then she launches him approximately Sun-wards.

The sun endures this indignity.

She descends back to Earth.

"How did it go?"

"Smoothly. He will no longer be a problem."

"It's best if we divide the blame, here. Mr. Irving will be here in a few moments, and we can say that while you committed the act, I suggested the method and he provided the motivation. This will minimize conflict with the pack."

"All right."

And he arrives, as promised.

"Ellie. Where's my, ah, necromancer?"

"We killed him. You were motivated to end his life, because of his crimes against the town your wife and daughter gave their lives to protect, and I suggested a trip to the sun, and Ellie here supplied the method."

"Alright. Anything else?"

"We're better off without him."

Nod.

"What do you plan to do next?"

"We need to look into who summoned her here."

"My summoner is essentially my only point of vulnerability. So far, we have no leads."

"How does summoning work? What were the circumstances of yours?"

He explains what he knows about summoning circles, and the lack of any obvious summoners when she arrived.

She supplements slightly, but the doctor has essentially the full picture.