Final answer:
While the Sao Paulo police's specific promise is not stated, police can adopt various strategies like community-oriented policing, targeted patrols, and better training to reduce crime. Effectiveness and cost-benefit ratios of such initiatives should guide their implementation to ensure improved public safety.
Step-by-step explanation:
The police in Sao Paulo have not made a specific promise based on the information provided. However, to reduce crime rates, police departments globally can implement a range of strategies. These include community-oriented policing that enhances trust, targeted foot patrols in crime hotspots, and better street lighting. Moreover, specialized training programs for police officers can significantly increase the efficacy of these strategies. The benefit-cost ratio should guide the selection of interventions, such as increasing the likelihood of arrest to act as a deterrent, just as improved public education and economic conditions can prevent crime from occurring.
Police tactics that focus on intense community engagement and strategic placements such as CCTVs in targeted areas can also contribute to a reduction in crime. Likewise, personal police equipments like body cameras have been proved to reduce police misconduct and increase transparency. Each of these strategies should be assessed for their effectiveness and cost-efficiency to ensure the best possible outcomes for public safety.