By the time I turned around, the car was driving through the park. It happened so fast," witness Lesley Martinez said.

The viral "senior assassin" game has become a tradition for graduating high school students in the United States. Police departments warn it can be dangerous.

Editor's note: The video in the player above is from a previous report. A south suburban police department has become at least the second Chicago-area law enforcement agency in under a week to issue a ...