Have you ever looked for it? Here is a systematic review of available evidence: https://link.springer.com/article/10.1007/s10610-021-09500-8 https://link.sprin

Have you ever looked for it? Here is a systematic review of available evidence: https://link.springer.com/article/10.1007/s10610-021-09500-8 https://link.springer.com/article/10.1007/s10610-021-09500-8 > The systematic search strategies yielded 49 studies focusing on testing the effects of police presence or evaluating its measurement. We find evidence that police presence has mostly crime reduction effects on crimes related to motor theft, property, violence and guns. Police presence also reduces calls for service and improves traffic behaviour. Police presence focused on specific areas, times and types of crime achieves maximum effectiveness. The reviewed studies show a high degree of heterogeneity in reporting which limits comparability of findings across studies. Research on police presence presents evidence for significant crime preventative effects of focused police actions and shows strongest effects when focused on certain areas, times, or types of crimes Look at the 49 studies they went through. Most of them show that adding officers lowers crime. Now you have seen the data.