This blog asserts it was the first to publicly report this connection at around 7:40 pm Monday evening. The earliest press report to make the same connection hit the Internet after 8:00 pm.
UPDATE: However, a recent press report indicates the stabbing may have been done in self-defense.
Khari Noerdlinger is the 19 year old son of the former chief of staff, Rachel Noerdlinger. She is the chief of staff of Chirlane McCray, the wife of New York City Mayor Bill deBlasio.
Rachel Noerdlinger was revealed by the New York Post last year to have a live in boyfriend names Hassaun McFarland, a convicted killer. The elder Noerdlinger was criticized for holding her position while living outside New York City and was reportedly granted a residency waiver.
More details may be provided later as more information is obtained. This report has relied on information reported since 2014 by various news sources.
UPDATE 2: From NJ Advance Media Monday night, 9 PM.