BOSTON (AP) -- Former NFL star Aaron Hernandez is going on trial again for murder - this time for the 2012 fatal shootings of two men outside a Boston nightclub. Hernandez already is serving a life sentence for the 2013 killing of Odin Lloyd, a semi-professional football player who was dating the sister of Hernandez's fiancé.
A guide to the trial and key background about the case:
THE DEFENDANT
Hernandez, 27, was a star tight end for the New England Patriots. He grew up in Bristol, Connecticut, and played football at the University of Florida before being drafted by the Patriots in 2010.