based on my vast knowledge from watching Criminal Minds, Dirty Harry, Scarface, A-Team, and other various movies and TV shows, I'm going to make a theory:
the victim was a small time drug dealer, known to have cash and drugs on hand.
video cams outside and inside the house, expecting something like robbery or other illegal activity, or someone stealing their stuff
perps were a third party in which a mutual party has been to the house and knows what goes on and the layout of the place, informs perps who are violent thieves and rob the victims, firearms if they are real are unregistered
or I could be totally wrong.
