Amazing…startling: New York City cops have arrested a blue-collar guy who’s allegedly confessed to killing actress Adrienne Shelly in a furious rage. The 40 year-old actress was found hanging from a shower rod in a West Village apartment last Wednesday. A New York Post story that ran on Friday said that “law-enforcement sources said they are inclined to believe Shelly’s death…was a suicide, noting there was no sign of struggle or forced entry in the fourth-floor apartment.” But a CBS News report says that a 19 year-old constructon worker named Diego Pillco has told cops that he “punched” Shelly “after she complained about the noise he was making in the West Village building where her office is located,” and that the blows killed her. (Unless he’s Joe Louis and he just hit her once.) Pillco then “allegedly admitted to dragging the body up to her office, and positioning her in the shower to make her death look like a suicide.” The CBS report says that “the medical examiner’s office had not yet ruled whether Shelly’s death was a homicide or a suicide.”