Study tracks use of tear gas as Portland nears 70 days of protests

https://www.kptv.com/news/study-tracks-use-of-tear-gas-as-portland-nears-70-days-of-protests/article_963a57c6-d6a8-11ea-93b6-df94059985fc.html#utm_source=kptv.com&utm_campaign=%2Fnews%2Fstudy-tracks-use-of-tear-gas-as-portland-nears-70-days-of-protests%2Farticle-963a57c6-d6a8-11ea-93b6-df94059985fc.html%3Fmode%3Demail%26-dc%3D1596584101&utm_medium=auto%20alert%20email&utm_content=headline