Aaron Swartz, who co-founded Reddit and became an internet folk hero for fighting to make online content free to the public, has committed suicide by hanging. He had a history of depression. He was facing 13 felony charges, including wire fraud, computer fraud and unlawfully obtaining information from a protected computer. Swartz pleaded not guilty, and his trial in federal court was scheduled to begin next month. If convicted, he could have faced decades in prison and steep fines.