Robert
*Mevis would flinch seeing his guess was correct. A vampire assassin that had been living off the caretakers blood while he hid. The question was why he stayed? Surely no skilled or intelligent assassin would stay around the crime scene, especially for this long. Was there an agenda he had here? Well in either case, these question would likely be best answered with the help of the sheriff on his side. He would lift the assassin over his shoulder and bow to the caretaker*

"I'll be taking him to the sheriff then. Will likely have all our questions answered after a bit of interrogation. You have any questions you would like me to ask him during the interrogation? If not, I guess I'll take my leave"
Peggy
"Hmm?" Jolted out of her thoughts, the Caretaker blinks once and twice before reacting. "Ah- er..."
After a moment of flustered deliberation. The caretaker shakes her head with finality. "I don't believe so."
Robert
*Mevis would nod once more. He found it odd she had had no questions, but he wasn't going to force her to come up with one either. So he would just carrying the assassin over to the inn where the sheriff was and assuming he was still there he would call out*

"Sh-Sheriff! It's me Mevis! I think I caught the assassin! Shall we interrogate him when he wakes up?"

*Of course Mevis was prepared for a barrage of questions from the sheriff given how sudden it is for someone like him to return with the assassin, but he figured he may as well get straight to the point if possible*
Peggy
The sheriff is pacing around, perusing a document, when Mevis interrupts. He turns around tiredly. "What is-" 
Whatever he was reading is quickly forgotten as it flutters to the ground.

"..."

After a moment of awkward silence as he and the guards comprehended what was going on, he waved his entourage to take and restrain the unconscious body, before he stepped mere centimetres away from Mevis, and looked him dead in the eyes with an almost suffocatingly piercing look.

"Explain. I have all day."
Robert
*Mevis would start to cold sweat again. Why was the sheriff looking at him like that... It made him feel like did something wrong... He would take a step away from the sheriff and scratch the back of his head nervously*

"Uh, well, I told you earlier I was going to try to find a trail to follow right? So I, uh, followed the trail and reached the morgue. I decided to talk to the caretaker as some weird stuff was happening with her, and then I was, uh, attacked by this fella. Given his skillset and how he told me I shouldn't interfere, I, uh, think I can say with some confidence that he is the assassin..."

*Mevis hoped his response would ease the intimidating stare the sheriff was giving him.*
Peggy
Holding the stare for a while, the sheriff let out a long-suffering sigh, before clasping his face with his left hand.

"That sounds absolutely ridiculous... But I believe you. Looks like we're going to have a lot of work on our hands."

Slowly moving his hand aside and levelling his head straight, he continues. "Anyway, elaborate more clearly what happened on your end. As I said, we have a lot of time on our hands." His eyes are now intent with focus, and he fishes out a notepad from his coat, holding what seems to be a magical pen with the other.