Name: Hero resource officer who saved students from shooter speaks out
Uploaded: Thu May 24 2018 12:48:07 GMT+0000 (UTC)
Duration: 2 min 42 s
Description: When a student brought a gun to an Illinois school and opened fire, Mark Dallas confronted him. Now the resource officer who has been hailed as a hero is sharing his story for the first time. NBC’s Ron Mott talks with him exclusively.

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May 24, 201802:42