The president also singled out several names of law enforcement officials who perished as a result of anti-police attacks in 2016.
The first National Police Memorial Day was proclaimed by President John F. Kennedy in 1962, and the week in which it falls would then be designated National Police Week.
The White House will be illuminated with blue lights tonight to honor law enforcement, President Trump announced Monday.
On Monday, he signed a proclamation at Tamarind Park in honor of the HPD officers who have lost their lives in the line of duty.
"I want you to know that patriotic Americans of all backgrounds truly support and love our police", he said.
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Honoring the men and women in blue who gave their lives in the line of duty. "Please, take time this week to thank your local officers and their families for their sacrifices and commitment to your community".
The names of 394 officers that were killed in the line of duty were read out loud, 143 of those officers have died past year.
Even though law enforcement officers wear uniforms of many different colors, many wear something blue to show support for officers on this solemn day of May 15.
"It's nice to see people outside of law enforcement haven't forgotten and it's nice for the Mayors Coalition and the Governor's Office to put things together for this". Each year at the memorial service, they catch up with old friends who served alongside a loving husband and father.
As cities across the country mark Police Week, the Favelas become a reminder of the sacrifices officers and their families make each day.