who was responsible for unleashing the Melissa computer virus
David L. Smith from New Jersey was arrested for unleashing the Melissa computer virus. That particular virus affected emails and sent mass emails, which blocked email traffic. For more information, see this link: http://articles.cnn.com/1999-04-02/tech/9904_02_melissa.arrest.03_1_computer-virus-attorney-general-peter-verniero-monmouth-county-jail?_s=PM:TECH.
It was a man named David Smith from New Jersey. He was sentenced to twenty months in prison for releasing the virus.