Months. taking steps to acquire the gas canisters and gas mask. he s going to be aggrieved, he s going to be angry, and then silent for the last week or two as he got very close to his flash point. if that describes someone you know, please call the police. that s the kind of public appeal that will cause the light bulb to go on and say i know who that is. so, pete williams, to give a little bit more information, add to what you were saying, upon leaving the train the suspect left his 9 millimeter glock which jammed up. he also left his gas mask and more than one smoke canister and a bag that he had onboard. when they are doing that fingerprinting if the person is in the system and it s hard to imagine they wouldn t be