Is there an annual event honoring policemen killed in the line of duty?

Yes, there is an annual event known as National Police Week, which takes place in May in the United States. During this week, fallen law enforcement officers are honored, and various ceremonies are held, including the National Peace Officers' Memorial Service in Washington, D.C. This event pays tribute to officers who have made the ultimate sacrifice while serving their communities. Additionally, local ceremonies are often conducted across the country to honor those who have died in the line of duty.