STAMFORD — A city man who’s believed to be connected to several shootings now faces arson charges after police said he set a stolen car on fire this month. On Jan. 14, the same car was seen during a violent carjacking in Norwalk, where three masked men stole a black Toyota Camry from a Chinese food deliveryman — but not before they shot him in the leg and arm, police said. Conklin said Assistant Fire Marshal Antonio Forte discovered a video of the men pumping gas into the two stolen cars at a Shell gas station.