The vigil will be at the National Law Enforcement Officers  Memorial at E Street, between 4th and 5th Streets, NW in Washington D.C.
Along with Holder, other guest speakers include Craig Floyd, chairman and chief executive of the National Law Enforcement Officer Memorial Fund; Jennifer Thacker, president of Concerns of Police Survivors and other law enformcement leaders.
Each May 13, an estimated 20,000 people assemble at the Memorial  grounds in Judiciary Square for the Candlelight Vigil, which is part of National  Police Week, which runs from May 9-14.
The 116 officers killed in the line of duty in 2009 was the lowest number  since 1959, when there were 109 deaths. Between 2008 and 2009, law  enforcement fatalities declined by 16 percent, an encouraging  development driven by a sharp, 28 percent reduction in the number of  officers killed in traffic-related incidents.
However, the number of  officers killed by gunfire rose last year, from 40 in 2008 to 49 in  2009. The 2009 total included 15 officers who were gunned down in five  multiple-fatality shooting incidents in Oakland (Calif.), Pittsburgh (Pa.),  Okaloosa County (Fla.), Seminole County (Okla.) and Lakewood (Wash.).
"As encouraging as the overall numbers were last year, we remain  deeply concerned about the rise in firearms violence against our  officers-a trend that, unfortunately, has continued into the first four  months of 2010," according to Floyd. "On May 13 during our Candlelight  Vigil, we honor the brave men and women of law enforcement who  put the safety and protection of others ahead of their own and who made  the ultimate sacrifice in the process."
A complete schedule of National Police Week events in Washington,  D.C., can be found at the 
        NLEOMF website
      .
Dedicated in 1991, the National  Law Enforcement  Officers Memorial honors U.S. law enforcement  officers who have  died in the line of duty. Including the officers whose  names are being  added this year, there are now 18,983 names engraved on  the Memorial,  representing all 50 states, the District of Columbia,  U.S. territories,  and federal law enforcement and military police  agencies.