Harley Lyndon

Harley Lyndon (died 1990) was the leader of the infamous Black Rose Gang.

Early life
At some point, she became a known criminal to the point that Central City knew about her frequent crime with her gang when she became wanted on 3 states for murder.

Death
In 1990, she and her gang were robbing the Central City Fur Exchange but got caught by the Flash, and they had to escape by car. During the chase with the car, the Flash blocked their way causing the car to crash and Harley died.

Legacy
Her death caused the rest of the gang to hold grudges against the Flash for her death which facilitated the admission of Tina McGee in the gang.

Trivia

 * Her actress wasn't credited in the episode. But The Flash TV Special revealed the character to be played by Bella Pollini.