https://www.ksdk.com/video/news/local/baltimore-group-in-st-louis-training-violence-interrupters-on-new-strategies/63-2fe86769-0bbd-47d0-9d10-ef68db704ab6 
https://www.ksdk.com/article/news/local/baltimore-group-in-st-louis-training-violence-interrupters-new-strategies/63-b46dea33-34c9-402e-8df4-1f907881fe48