I am a Professional Specialist at the School of Public and International Affairs (SPIA) at Princeton University. My current research focuses on police diversity and its effect on officer behavior, such as whether officers of different races, sexes, or political opinions police differently, and improving methods of measuring racial discrimination. I have also researched how removing “bad apples” would affect complaints against police, crime prevention through environmental design, whether sporting events affect crime, and the effect of both policing and gang takedowns on crime.

I hold a Ph.D. and an M.S. in criminology from the University of Pennsylvania and a BS. in criminal justice from Sacramento State. I primarily use R and have written several R packages and a book on R, "A Criminologist's Guide to R: Crime by the Numbers," which has been published by CRC Press.

I created the Crime Data Tool to make it easy for people to look at crime (and other) data without having to know how to program. Crime Data Tool provides broad access to UCR data, enabling users to visualize and analyze trends in crime, arrests, officer employment, and related areas across various agencies and timeframes. The tool includes data on crimes, arrests, assaults and killings of police officers, and demographic information of individuals involved in crimes, among many other variables. I have released cleaned versions of the full data from the FBI on the Harvard Dataverse website here.

A copy of my resume can be viewed here.
A copy of my CV can be viewed here.