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San Francisco Crime Data: Impact Of Early Reporting On Resolution

This post was originally published on The Data School blog between 2018 and July 2025, before our program was renamed to MIP’s Analytics Career Accelerator. References throughout this article to “The Data School” or “DS” all refer to what is now MIP’s Analytics Career Accelerator. The program, its people, and its commitment to launching outstanding analytics careers remain the same – just under a new name.

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Like any city, San Francisco has a myriad of crimes. Now I compare reporting a crime like taking a doctor’s appointment. I tend to put going for doctor’s appointment at the bottom of my daily important works. While I am giving this analogy, it is not exactly same for crime reporting. Most of the cases victims are usually too shaken up to go and report the crime. So, I always wondered does delay in the reporting impacts the ability to solve the crime? So, when I received crime data for San Francisco for last 5 years, I thought why not see how much impact it has. Spoiler, it has quite a huge impact.

For this particular dashboard, I decided to use long form of dashboard as I wanted to show as much as information possible using charts. I also decided to use simple, true and tried form of chart; bar chart and line chart. First, chart I used was to show the change in amount of crimes in last five year.

Next, I used a heat map to show the times when crimes happen most. After that I moved to the center piece of my dashboard, which was to see the relation between reporting time and resolution time of the crime. Upon analysis, I noticed that most of the crimes that got reported within 24 hours, over 70% of them reached a resolution. But crimes like kidnapping being only exceptional.

I also noticed that in the dataset there was a column to check if the report was made online. I was surprised to see none of the cases reported online reached a resolution. Considering the impact of timely reporting a crime, one would assume that online reporting system will play a vital role. But it was the opposite in this case. Therefore, I think this is a situation of concern for San Francisco Police Department.

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