sayfullo saipov had been under nypd surveillance. rob schmidt is live outside that mosque in paterson, new jersey. >> the area of the investigation. we're in paterson, new jersey. the mosque right behind me the omar mosque has been on the radar of the nypd since 2005. all that mosque surveillance that began happening after 9/11. the suspect sayfullo saipov lived in the apartment building that literally butts right up against this mosque and we're trying to get a timeline now on how long he has been here because one man that goes to the mosque says nobody at the mosque recognized the picture and says that they don't think he has been here very long. that begs the question did he come into the new york area, into the northeast just to commit this horrible act or has he been here for longer than