by Nicole Einbinder

Adrian Lamo, the hacker who reported Chelsea Manning to the FBI after Manning divulged to him that she had leaked classified material to WikiLeaks, died last week in Wichita, Kansas at the age of 37.

Manning was a 22-year-old Army intelligence analyst based in Iraq when she contacted Lamo via AOL Instant Messenger in 2010 under the name “Bradass 87.” In the course of their exchanges, Manning revealed to Lamo that she used her security clearance to access more than 260,000 diplomatic cables and thousands of classified documents, including a video of an American helicopter attack in Baghdad that left 12 people dead. The video was later published by WikiLeaks under the title “Collateral Murder.”

Lamo would hand over his chat logs with Manning to authorities after learning she had given the classified information to WikiLeaks. In a 2011 interview for the FRONTLINE film WikiSecrets, Lamo explained his decision, saying, “I believed and knew that [she] couldn’t possibly have vetted over a quarter of a million documents [herself] and reassured [herself] to [her] satisfaction that they didn’t contain anything that would cause human harm.”

“I felt that was a really indiscriminate action, one that was not taking into account the well-being of others, and the re-occurrences of that sort of event needed to be prevented,” he explained. “At that point, the needs of the many outweighed the needs of one.”

Manning was eventually arrested, charged and given a 35-year prison term under the Espionage Act for leaking over 700,000 government records. The sentence was the longest punishment on record for a leak conviction. After the sentencing in 2013, Manning, who was previously known as “Bradley,” came out as transgender.

In one of his last moves in office, President Obama commuted Manning’s sentence. She was released last May after serving more than seven years at a military prison.

Lamo was widely criticized for reporting Manning, with WikiLeaks founder Julian Assange describing him as a “serial FBI snitch.” Others considered him a hero and patriot.

While Lamo’s cause of death remains unknown, Wichita police officer Charley Davidson told The Wichita Eagle that there was “nothing suspicious about his death.”

In addition to reporting Manning, Lamo also notoriously hacked into the computer networks of organizations like Microsoft and The New York Times. He pleaded guilty to hacking into The Times in 2004 and was sentenced to house arrest and probation.

“A bright mind and compassionate soul is gone,” Mario Lamo, Lamo’s father, wrote in a Facebook post last week. “He was my beloved son.”