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Aaron Mendelson works on KPCC's data journalism and interactive projects.
At KPCC, he has used data to shine a light on the avalanche of outside money in local politics, spiking firearms sales, Los Angeles' bicycle infrastructure, and police militarization. He helped build a unique database on officer-involved shootings in Los Angeles County for KPCC's Officer Involved project.
Aaron joined KPCC in 2014 and became a member of the station's investigative team in 2017
He holds a master's degree from the UC Berkeley Graduate School of Journalism. Prior to joining KPCC, his work had been published and aired by Reuters, Marketplace, KQED and Mother Jones. He got his start in journalism at KFAI in Minneapolis.
Stories by Aaron Mendelson
Voters in the 34th Congressional District in the Los Angeles pick their next U.S. House member Tuesday. If fundraising is any indication, the results may be close.
Monica Rodriguez will be headed to the Los Angeles City Council and KellyGonez will join the L.A. Unified School District board, according to final election results.
An investigation by KPCC and The San Bernardino Sun found more than 70 percent of 103 people shot by officers in San Bernardino County in a six-year period disclosed or tested positive for substance use.
An investigation by KPCC and The San Bernardino Sun found officers in San Bernardino County shoot into moving cars at nearly double the rate of neighboring Los Angeles County.
KPCC and The San Bernardino Sun built a database tracking police shootings in San Bernardino County from 2010 through 2015, providing an unprecedented examination of police shootings in the county.
Outside groups have spent more than $14 million to influence voters. Smaller sums are being raised to sway decisions on a police oversight measure, the only citywide race.
Explore are the trends in collisions in 55 of California's 58 counties — each county with a population of at least 10,000. While you can see broad similarities between many counties, each graph tells its own story.
As the economy has picked up since 2009, more trucks have been on the roads. That's meant more big truck collisions, which have an outsized cost, both financially and in terms of human life. Not only have their numbers jumped, but the share of all collisions that involve a big truck has been on the rise.
Last week's crash on the I-5 freeway brought home the high toll of big rig collisions in road damage, traffic delays and human life on Southern California's roadways.
This user-friendly database shows vaccination exemption rates for incoming kindergartners at schools in Los Angeles, Orange, Riverside, San Bernardino and Ventura counties, based on data from the California Department of Public Health.
Metro drew 130,000 rides on its bike share system from July to March, but it will take more users to hit its mark. Drier spring and summer weather should help.
Metro's bike share network logged more than 130,000 trips in its first nine months. Using this map, you can explore the number of trips that started and ended at each of the network's Downtown Los Angeles stations.
Just how much rain has the region received? Quite a bit: 120 percent of a typical full year, in just six months. That's helped with the drought.
Californians bought guns at a blazing-fast pace in 2016, setting a record for the most guns ever sold in the state, at 1.3 million, according to state data.
Particulate matter pollution is typically worse in the winter, but this year's storms have made for one of the clearest winters in years.