A Wizard at Prying Government Secrets From the Government

LOS ANGELES — When the reporter Jason Leopold gets ready to take on the United States government, he psychs himself up by listening to the heavy metal bands Slayer and Pantera.   Mr. Leopold describes himself as “a pretty rageful guy.” He argued recently with staff members at his son’s preschool because he objected to their references to “Indians” and they objected to his wearing family-unfriendly punk rock T-shirts to school meetings.