From the overview:
This page provides information about duly sworn law enforcement officers (who met certain other criteria such as having full arrest powers, ordinarily carrying a badge and gun, etc.) who were killed in the line of duty during 2009. These officers came from city, university and college, county, state, tribal, and federal agencies.
* In 2009, 48 law enforcement officers were feloniously killed in the line of duty.
* Thirty-two of the slain officers were employed by city police departments. Of these, nearly half (15) were with law enforcement agencies in cities with 250,000 or more inhabitants.
* Line-of-duty deaths occurred in 18 states and Puerto Rico. Twenty-one officers lost their lives in the South. Thirteen of the officers died in the West, 7 died in the Northeast, and 5 officers who were feloniously slain were employed in the Midwest.