JSO said the officer worked the midnight shift. Police said next of kin has not been notified yet.
Williams believes weather may have played a factor in the crash.
MORE: Photos from the deadly crash scene
The director of JSO patrol and law enforcement, Mike Bruno, said the community's heart is saddened and describes the officer as a hero.
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"Heroes are the individuals that, every day, pin on the badge or put on the uniform, knowing they might not come back, but go out anyways," Bruno said.
JSO said the officer was killed on Police Memorial Day.
"It's another reminder of the risks that men and women of JSO take on everyday when they come on this job,'' Williams said.
The Florida Highway Patrol is investigating the crash.