Minutes after the NYPD posted saying they had the suspect in custody, Trump was tweeting about coal. 
Nothing so far on the victims.
Surely, he'd have been informed by then. And by now.
NYPD NEWSVerified account
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Due to police activity, avoid the area of Chambers Street/West St.
One person is in custody. Expect many emergency personnel in the area.
7:25 pm - 31 Oct 2017
Donald J. TrumpVerified account
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U.S. COAL PRODUCTION
Up📈7.8% past year.
Down📉31.5% last 10 years.
#EndingWarOnCoal
0:24
7:41 pm - 31 Oct 2017