Results of the augmented Dicky-Fuller test for unit root are displayed in Table 2. For each type of reactive and proactive activity, coefficients and significance tests are reported for the observed pre-COVID trends in the data. For violent crime calls, calls for disorder incidents, and servicerelated calls, the trend parameters prior to COVID-19 are insignificant (p > .05). There are significant increased trends pre-COVID-19 for property crime calls, self-initiated DRT activities, and self-initiated special crime investigation unit activities (t > 0, and p < .05). There are significant decreased trends pre-COVID-19 for suspicious incident calls, traffic-related calls, non-crime events, and self-initiated patrol activities (t < 0, and p < .05). However, results for each of the augmented Dickey-Fuller tests reject the null hypothesis that there is a unit root in the time series **data** (p < .001). Experiments with fewer or more lags (1 to 3) produced the same conclusion. Even though there were some observed increased or decreased trends in police activities prior to COVID-19, it can be concluded that the time series **data** are stationary overall.