Adrian Lamo, the hacker who turned Chelsea Manning in to the FBI for leaking classified information, has died. The cause of Lamo’s death has not been released, but he was just 37 years old. He was hospitalized and diagnosed with Asperger’s in 2010. Lamo first gained notoriety in 2002 when he hacked into the The New York Times, Microsoft, and Yahoo—which prompted Manning to reach out to him online. Manning was later sentenced to 35 years in prison, but her sentence was famously commuted by President Barack Obama, which led to her release in 2017.