Jessica Blanche

Jessica Blance was found murdered in White Night.

Story
Harry goes to the Forensic Institute (the morgue) where Waldo Butters gives him a list of desceased women murdered by the same MO as the others who were all practitioners. Jessica Blanche was among them. Butters shows Harry her body. With Molly Carpenter's help, a secret message is discovered on her body—EX.22:18—that only a wizard would have found.

Because she was killed in very similar circumstances to the other practitioners who are being targeted and murdered, it's assumed that she's another practitioner. But no one in the Ordo Lebes recalls ever meeting Jessica. That makes her the odd corpse out.

Murphy finds out from a friend in Vice that Jessica was an employee of the Velvet Room, now under new management and owned by Marcone.

Harry and Murphy go to the Velvet Room, now called Executive Priority Health, to investigate. They talk to Ms. Demeter, who is really Helen Beckitt. Jeesica lived near Helen and would ofter travel back and forth to work together. That is problably when Madrigal Raith saw them together and assumed that Jessica was another practitioner and killing her in the House Raith style.