The construction worker accused of killing indie actress .Adrienne Shelly tied a sheet around her neck, dragged the unconscious woman to a bathroom - and strung her up while she was still breathing, sources said yesterday. Then 19-year-old illegal immigrant Diego Pillco fled the West Village building and calmly went to work at another job site - leaving her to die in what originally appeared to be a suicide, the sources said. "This woman did not die from a strike to her head," Assistant District Attorney Marit DeLozier said as Pillco was arraigned in Manhattan Criminal Court. Pillco "fought with...