What Happened to the Couple?

Billy jean mentioned receiving a fresh batch of pills for her and bill to sell. The couple apparently carried out some low level drug dealing to make extra cash to buy things for their baby. Lindsey wondered if a buyer was supposed to meet bill before he left for work and things turned deadly. This seemed even more likely, given that metham fedemin was not found in either of the victims systems,. but was sitting out on a plate with a straw beside it, as though someone had recently taken a hit.