College student arrested while warning drivers about 'speed trap'

A college student in Houston, Texas is facing misdemeanor charges after holding up a sign warning oncoming drivers about a speed trap.

Natalie Plummer said she was riding her bike home from the store when she saw the officer pulling people over.

She said it seemed unfair, so she stood on the sidewalk, sign in hand, letting drivers know to slow down.    

Plummer said she couldn't predict what would happen next.

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"[The officer] jumped out of the car and started pulling on my back pack and started pulling me around and said gimme that gimme that. And I was like what are you doing?"

Plummer said the officer told her she was obstructing justice and could serve up to 5 years in prison.

Then he took her to jail.

In the end, she was charged with walking in a roadway where sidewalks are present.

Plummer, by the way, said she never left the sidewalk. Read more.

What do you think happened?