Demons at Fourth District (4)

It managed to leave a slight burn on the fox woman's hand, unlike Li Fei'er's talismans. The fox woman didn't even show any indication that she was hurt by it, though. 

"A human." Shen Minyao chuckled in amusement before adding: "An exorcist on top of that." 

"What did you say?" Jiang Chen's frown was only deepened by the fox woman's words. "Are you certain?" 

"Mr. Jiang shouldn't doubt Milady's words. It's indeed the doing of an exorcist," Xiao Bai explained, as they watched the burn on Shen Minyao's hand disappear without a trace. 

"I don't understand…" Jiang Chen's words trailed off. Exorcists were supposed to help cast away demons, not to help them feed on humans. 

So why would an exorcist set up a barrier to help the demons trap the human souls they collected from the road accidents they instigated?