The Boston shooting witness and the supposed Nancy Lanza friend are the same woman. It looks as if they applied some plasticine makeup on her nose and forehead when she played the part of the Lanza aquaintance. She also has her glasses pushed to the top of her nose, essentially hiding her eyes in the street interview. The clincher is the voice matchup: listen at the 7:58 time mark. Boston witness says "guns" followed by Lanza witness speaking. It is an exact match. Conclusion - same woman.