Lance DeMoi and the Eldritch Machine.

Lance sifted through the cracked, dirty sheafs of parchment.  Otto and Chester looked around the dark and dirty New York apartment.  DPIR agents guarded the door and marked and examined the crime scene.  Chester felt different objects in his tentacles, and Otto scrutinized technical diagrams and bits of machinery.  Lance looked up at the pale, emaciated body lying on the table.  Otto walked over and looked at the corpse.
"It looks like a vampire attack."  He said, pointing at the two marks on the body's neck.  Lance shook his head.
"There's no venom in his bloodstream, and the distance and angle of the marks aren't right for a vampire.  Whoever murdered him wanted it to look like a vampire, or he stuck him with a needle twice for whatever reason.  Besides, the landlord found ol' Corpsey in the building, a vampire can't enter human dwellings."
Otto was silent for a moment, then he snapped his metal fingers.
"Alison and I were investigating a murder in Philadelphia, same two marks in his neck and emaciated look, and he was an old master mechanic.  Otto dug around in the dead man's pockets, and withdrew his wallet.  He took out his ID.
"Maxwell Krauss."  He said.  Lance stood up and looked at Krauss's passport and license.
"And an electrician."  Lance said.
"So... the murderer is a Luddite?"  Otto chuckled.
"Or Mr. Murder likes taking out his contacts?" Said Lance,  "All the big bad mysterious bad guys do that, it's overdone."
Chester floated over to them, the Dweller's tattoos glowed slightly.
"Magic has been worked here, it lingers still in the air."  Chester said in his squeaky voice.
"So, Krauss is, or was, in on something.  You know like,"  Lance raised his eyebrows, "Something."
Otto tapped his nose with a finger, "I get you."
Lance's cell phone started ringing, he looked at the caller ID.
"Ah, it's Bianca."
He answered the cell phone, "I knew you'd finally call me!"
"No, Lance, no.  Anyway, Sirius and I are in DC, it's a murder,  exactly like the one Otto and Alison investigated early this month; two puncture wounds in the neck, and-"
"And a shriveled up corpse, oh and some master technician or something.  Exactly like what were looking at."
"Our stiff was some crusty plumber, very experienced though."  Bianca said over the phone.
"A mechanic, electrician, and plumber.   Someone wanted something examined or fixed, and something magic too.  But also something secret.  Bad guys are so predictable."  Lance said.
"Kain van Hompt wasn't predictable."  Otto said, smiling.  Lance's face flushed red.
"That was because he could mess with your brain and stuff, just like be quiet Otto."
"DC, Philadelphia, and New York, all three cities sit on the same ley line, now we should expect a similar murder in Boston."  Chester said.
"So, a murdering Luddite magician wants a magic machine, an infernal mix of sorcery and technology."