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Sergio Hernández

Sergio Hernández is a reporter and developer on ProPublica’s news apps team.

Sergio Hernández is a reporter and developer with ProPublica’s news apps team.

Before joining ProPublica, Hernández was a reporter and data editor at CNN, where he led efforts to develop data journalism standards and expand the use of computer-assisted reporting techniques. His work has previously appeared in Mashable, The Week, The Village Voice, Gawker and BuzzFeed. From 2011 to 2014, he worked as a reporting intern and contributor for ProPublica.

Video: In the Interrogation Room With Nick Rhoades

How We Built Our HIV Crime Data Set

Sex, Lies and HIV: When What You Don't Tell Your Partner Is a Crime

People with HIV have been sentenced to years or even decades in prison for having sex without telling their partners they’re infected, even when they practiced safe sex. Are these laws a deterrent to spreading the virus or could they actually fuel the epidemic?

Intern vs. Mayor: Battle Bares Bloomberg's Argument for Secrecy

When Mayor Michael Bloomberg tapped Cathie Black to be schools chancellor, a lowly intern filed a freedom of information request that the city fought for two years. Now, that intern reflects on why the mayor tried so hard to keep secret emails that turned out to be innocuous.

Out of Order

Who Polices Prosecutors Who Abuse Their Authority? Usually Nobody

The innocent can wind up in prison. The guilty can be set free. But New York City prosecutors who withhold evidence, tolerate false testimony or commit other abuses almost never see their careers damaged.

A Reader’s Guide to the (Still Coming) Sarah Palin Emails

After three years of wrangling with the State of Alaska, we're finally getting a look at the emails Sarah Palin sent during her time as governor.

Dominique Strauss-Kahn and the Reach of Diplomatic Immunity

IMF chief Dominique Strauss-Kahn is accused of sexually assaulting a maid in a Manhattan hotel, but could his IMF job snag him a "Get Out of Jail Free" card?

Post Mortem

NOPD Officers Convicted in Handyman’s Beating Death

A federal jury in New Orleans convicts two officers originally cleared of wrongdoing when a local forensic pathologist called Raymond Robair's beating death an accident.

Post Mortem

NOPD Beating Death Trial Draws to a Close

A federal jury will hear closing arguments today against two officers originally cleared of wrongdoing when a local forensic pathologist called Raymond Robair’s death an accident.

Nuclear Safety

Our Quick Guide to Nuclear Plant Safety: What Could Go Wrong?

With nuclear safety concerns in the forefront as Japan works to stave off a meltdown, here's a look at some potential vulnerabilties when what can go wrong does go wrong.