Watch Criminal Minds Online: Season 13 Episode 15

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Did Linda Barnes prove to be a solid addition to the BAU?

That was revealed on Criminal Minds Season 13 Episode 15 when the FBI's assistant director of national security appeared to help them out with with a quadruple homicide. 

The harrowing murder happened to a group of roommates in St. Louis. 

With the team struggling to find a motive, they struggled to conclude whether it was a premeditated attack. 

Use the video above to watch Criminal Minds online right here via TV Fanatic. 

Get up to speed with the latest twists and turns on this chilling series. 

Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.

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