http://www.washingtontimes.com/news/2006/jul/20/20060720-105038-6625r/
Most parking tickets are issued electronically by the city’s Department of Public Works, which hires 175 parking enforcers to patrol 3,500 city blocks on weekdays.
But 28 other law-enforcement agencies in the District — including Metropolitan Police and U.S. Park Police — can issue handwritten tickets that are not always entered promptly into DMV’s electronic payment system, officials said.