The Unsub, John Pringle, is a "blood drinker" who suffers from a delusional belief that consuming the blood of young, healthy victims will cure his own terminal illness.
If you're looking for the competitive cooking show (Season 12, Episode 18): [S12E18] Hell's Kitchen
The team tracks him to an old boiler room where they find the most recent victim, Katie, just in time. ⚖️ The Reid Subplot The Unsub, John Pringle, is a "blood drinker"
He uses a specialized "blood-letting" kit and keeps victims in a hidden basement cellar. [S12E18] Hell's Kitchen
Dr. Spencer Reid's ongoing incarceration and legal battle. Case File: The Unsub
A major focus of this episode is time in prison.