After several recent attacks on TriMet passengers, the transportation agency has invested millions in hiring private security officers. In addition, it will fund a prosecutor at the Multnomah County DA’s office to focus on TriMet crimes. The agency also recently announced the results of a study that found trace amounts of fentanyl on public transit surfaces in amounts that were not dangerous to the public. Meanwhile, TriMet ridership is down nearly 40%, and the agency plans to increase fares by 12%. We talk to TriMet Chief Safety Officer Andrew Wilson and Rob Hendrickson, medical toxicologist at OHSU.