In an exclusive interview, the friend who accused gunman Nikolas Cruz lived with for three months before the mass shooting at Marjory Stoneman Douglas High School in Florida speaks out for the very first time.

He reveals the last text he received from Cruz, just moments before Cruz allegedly sprayed his former classmates with bullets. Dr. Phil also talks with the parents who took Cruz in, and what they say he was like the night before he allegedly committed this horrific act.

Watch more: Nearly 19 Years After Columbine; Survivors Speak To Parkland Students

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