The suspect accused of causing an explosive seven-alarm fire in a Brooklyn garage is set to appear in court Tuesday. Dozens of cars went up in flames causing their tires to explode inside the Kings Plaza Shopping Center parking garage in Brooklyn Monday. Investigators say Avon Stephens, 23, was caught on surveillance video leaving the Kings Plaza shopping center parking lot before Monday morning's fire. He was told by security previously not to sleep in the garage. He's believed to be homeless. The vehicles burned on the second and third floors of the parking garage in Marine Park. Officials say there were as many as 120 cars being stored in the structure by a local car dealer. Stephens was taken into custody later Monday evening and arrested on a charge of arson. Eighteen firefighters and three civilians were being treated for smoke inhalation.