Last week the Seattle Police Department published its annual report on stops and detentions, with numbers for 2018. It begins by noting that Terry stops are up substantially over 2017 numbers — but then it provides another 25 pages of text, tables and charts that offer little help in understanding why. In fact, SPD itself admits in the report that they don’t know what the increase means:
SPD conducted 18.5% more Terry stops in 2018 than in 2017. However, statistical trend analysis shows that this increase appears to be an anomaly. Our analysis next year will indicate whether a pattern is developing or whether 2018’s data are a one-time increase.
But the data tells a clearer story than SPD is letting on. It took a few days of work to reverse-engineer and otherwise piece together the data that the department left out of its report and to follow the bread crumbs through it, but here’s the story that the data tells.