President Donald Trump showed his appreciation for fallen police officers at a ceremony on Monday.
"The attacks on our police must end and they must end right now", he said as the crowd applauded.
"When an officer dies in a community it changes that community forever and I think we need to remember that", JPD Chief Mike Yaniero said.
A percentage of the money from the plates goes back to the Law Enforcement Memorial Association, which supports families of fallen heroes.
Of those officers, 143 of them died a year ago. "We pay tribute to their strength, their honor, their courage, and comfort those or try to comfort those who they left behind", said Homeland Security Secretary John Kelly.