Folly Beach Public Safety tells news outlets 57-year-old David Stanley Hubbard was running sirens in his 2007 Honda Pilot when he picked up passengers from downtown Charleston on Saturday.
The passengers say Hubbard discussed "killing people and chasing murderers." They jumped out of the car when he came to a red light and flagged down police.
Police say they found a fake US Marshal badge, plug-in police lights, a stolen license plate, handcuffs and a semi-automatic pistol with two loaded magazines.
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