A US telecom company trained an AI model on years of inmates’ phone and video calls and is now piloting that model to scan their calls, texts, and emails in the hope of predicting and preventing crimes. 

Securus Technologies president Kevin Elder told MIT Technology Review that the company began building its AI tools in 2023, using its massive database of recorded calls to train AI models to detect criminal activity. It created one model, for example, using seven years of calls made by inmates in the Texas prison system, but it has been working on building other state- or county-specific models.

Over the past year, Elder says, Securus has been piloting the AI tools to monitor inmate conversations in real time (the company declined to specify where this is taking place, but its customers include jails holding people awaiting trial, prisons for those serving sentences, and Immigrations and Customs Enforcement detention facilities).

“We can point that large language model at an entire treasure trove [of data],” Elder says, “to detect and understand when crimes are being thought about or contemplated, so that you’re catching it much earlier in the cycle.”

As with its other monitoring tools, investigators at detention facilities can deploy the AI features to monitor randomly selected conversations or those of individuals suspected by facility investigators of criminal activity, according to Elder. The model will analyze phone and video calls, text messages, and emails and then flag sections for human agents to review. These agents then send them to investigators for follow-up. 

In an interview, Elder said Securus’ monitoring efforts have helped disrupt human trafficking and gang activities organized from within prisons, among other crimes, and said its tools are also used to identify prison staff who are bringing in contraband. But the company did not provide MIT Technology Review with any cases specifically uncovered by its new AI models. 

People in prison, and those they call, are notified that their conversations are recorded. But this doesn’t mean they’re aware that those conversations could be used to train an AI model, says Bianca Tylek, executive director of the prison rights advocacy group Worth Rises. 

“That’s coercive consent; there’s literally no other way you can communicate wi...