‘Criminal Minds’ season 13 episode 4 spoilers: BAU hunts down drone-flying killer

Promotional poster for “Criminal Minds” on CBS.Facebook/ CriminalMinds

In the next episode of “Criminal Minds,” the Behavioral Analysis Unit (BAU) led by Emily Prentiss (Paget Brewster) race against the clock to catch a stealthy killer who uses hi-tech drones to murder his victims.

The trailer for the upcoming installment titled “Killer App” was recently released and showed Prentiss telling an agent the seriousness of the case. “This unsub [unknown subject] has killed almost seven people,” she said chillingly. Apparently, the killer uses military drones in strikes to take down enemy targets. The murderer’s back is shown as he inspects and fixes his state-of-the-art killer drone. These devices prove to be stealthy as one is shown going downwards and looking inside the back of a car.

The case takes a turn for the worse when Prentiss accuses a manager for something that could turn the whole

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