Okay, folks, let's get this straight...
Scott = brother
Lance = brother
Doug = father
Mark = scumbag murderer
Lori = wife/victim of scumbag murderer (Mark)
Can't tell the players without a scorecard.
To make it even clearer...
Mark = scumbag murderer
Scott = brother of scumbag murderer
Lance = brother of scumbag murderer
Doug = father of scumbag murderer
Lori = wife/victim of scumbag murderer (Mark)