What is the fine-grained topic of the following text: On August 30, 2017 from 2:00-3:30 p.m. Eastern, the Bureau of Justice Assistance (BJA) Smart Policing Initiative (SPI) presented a webinar on “Reducing Crime and Improving Public Trust through Collective Efficacy: Evidence from Miami and Brooklyn Park”. Only return the topic.
"Reducing Crime and Improving Public Trust through Collective Efficacy: Evidence from Miami and Brooklyn Park" Webinar by BJA Smart Policing Initiative