Police increasingly use Facebook to solve crimes. Here’s why that’s a dangerous practice.

These days, everything happens on social media–including solving crime. Just as you know how easy it is to keep tabs on your ex through his Facebook, police quickly realized in recent years that online profiles can open up a whole world of candid information on potential suspects. The Atlantic has a fascinating piece that delves into the problems that arise from policing social media.

The author, Meredith Broussard, highlights one particularly disturbing story, where a misleading social media profile may have led to arresting an innocent man. Harlem resident Jelani Henry’s brother Asheem had joined a gang as a teenager, and while Jelani claims he had little involvement in actual gang activity, he was pressured into things like regularly liking their content on Facebook. If you don’t like the gang’s videos and other media, he explained to a reporter, “people are gonna ask you why.”

Eventually Jelani was arrested for a double shooting and sent to the notoriously violent Rikers Island prison. Jelani and his family claim he was falsely charged, all because of his supposed connections with the gang that amounted to nothing more than connections and Facebook likes, and a vague description of a “tall light-skinned black man in a hoodie” who committed the crime.

From Broussard:

On Facebook, there are only two options for a post: either you click the like button, or you don’t click the like button. There’s no field for someone like Jelani Henry to indicate “I clicked the like button on this post so I wouldn’t get harassed on my way to school.” A like is simply a number used as a flag, true (1) or false (0). Humans are the ones who invest likes with context and meaning. The computer only displays the results of its computation.

She also talks about how police databases of digital information, which are kept for a long time, can provide a sense of permanence to kids’ online actions that doesn’t reflect the reality of their lives:

This permanence does not necessarily match real-world conditions. Kids cycle in and out of street gangs the way they cycle in and out of any other social group, and many young men age out of violent behavior. Regularly purging the gang database, perhaps on a one-year or two-year cycle, would allow some measure of computational forgiveness. However, few institutions are good at keeping the data in their databases up-to-date. (If you’ve ever been served an ad for a product you just bought, you’re familiar with this problem of information persistence and the clumsiness of predictive algorithms.) The police are no worse and no better than the rest of us. Criminologist Charles Katz found that despite a written department policy in one large Midwestern police gang unit, data was not regularly audited or purged. “The last time that the gang unit purged its files, however, was in 1993 — approximately 4 years before this study was conducted,” he wrote.

Read the full piece here. 

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