They’re probably talking about Ziz’s group. The double homicide in Pennsylvania is likely the murder of Jamie Zajko’s parents referenced in this LW post, and the Vallejo county homicide is the landlord they had a fatal altercation with and who was killed recently.
Declaring black wins draws would be more in the spirit of how the game is actually played at high level. I don’t think anyone seriously considers the possibility that black could have a forced win in chess from the starting position.