More than 48 hours after the worst mass shooting in modern U.S. history, police still don’t have a motive for the horrific crime. But a more complete profile of the killer is beginning to emerge. Stephen Paddock, the Las Vegas shooter who killed 59 people at a country music festival Sunday night, worked over a 10-year period as a letter carrier for the U.S. Postal Service, an IRS agent and an auditor for the U.S. Department of Defense. A spokeswoman for the federal Office of Personnel Management told the

Associated Press Tuesday that Paddock’s employment included two years as a mail carrier from 1976 to 1978. That was followed by a six-year stint with the Internal Revenue Service until 1984. And then he worked as a defense auditor for about 18 months. Defense auditors are required to undergo background checks to receive security clearances. The latest revelation suggests the U.S. government should have an extensive file on their former employee, Stephen Paddock, who not only worked directly for the government for 10 years but then worked another year-and-a-half for federal weapons contractor Lockheed Martin. READ MORE