Arrests in Baltimore Drop in May

June 12, 2015

There’s been quite a bit of discussion about whether or not protests in Baltimore have resulted in a policing “slowdown.”

It’s clear (at least as far as the published data are concerned) that arrests have taken a dive in Baltimore. Total arrests in the Open Baltimore data for April 2015 were 2,438 while in May there were 1,449, a drop of about 40%.

Having the granular arrest data for Baltimore we can also take a look at whether or not the decline in arrests was more pronounced in particular areas (like West Baltimore, as the NY Times article linked above describes). At first glance a lot (around 45%) of arrest records are not geocoded with a lat-long pair and without knowing the reason for this exclusion it’s a safer assumption that there is some bias in the data available. Stay tuned.

Data obtained from Open Baltimore.
Analysis conducted using Python, Pandas, and
Full analysis IPython notebook can be found here.

Arrests in Baltimore Drop in May - June 12, 2015 - Justin Elszasz