The Chester County District Attorney's Office announced an update Friday in the death investigation of Ellen Greenberg. The district attorney's office said they are unable to move forward with criminal charges and are placing the investigation into an "inactive status." "The investigative team determined that, based on the current state of the evidence, we cannot prove beyond a reasonable doubt that a crime was committed," the DA's office said in a statement. Greenberg was 27 years old when she was found dead of more than 20 stab wounds inside her locked Manayunk apartment in 2011