HomeLocalNYC probing how subway serial killer suspect slipped through system, de Blasio saysNYC probing how subway serial killer suspect slipped through system, de Blasio saysWed, February 17, 2021SHARE NOW New York City has launched a review of how accused “subway ripper” Rigoberto Lopez slipped through the cracks of Mayor Bill de Blasio’s social and mental welfare bureaucracy in the aftermath of an A-train slashing spree that left two dead and two others injured, Hizzoner said Wednesday.