What we know about the alleged D.C. Navy Yard shooter
05:31
Share this -
copied
MSNBC's Lawrence O'Donnell talks to NBC's Michael Isikoff about the latest developments in the Navy Yard investigation and what we're learning about the alleged shooter's life before Monday’s deadly tragedy.Sept. 19, 2013
UP NEXT
Lawrence: Trump lawyers inventing an immunity argument they hope SCOTUS can accept
05:24
New alleged Menendez bribery scheme 'stinks to high heaven,' Litman says
03:50
Laurence Tribe obliterates Trump's Maine ballot challenge argument
07:59
Mark Meadows petitions 11th circuit on removal issue
01:20
K.I.N.D. student: Dreams would be ‘shattered’ without scholarship
05:32
Maine Secy. of State: Trump ‘chose to light a match’ on Jan. 6