They would have loved to leave things at that, but it just so happened that the leaders of the society of thieves died the day before Jake died. This could either be a coincidence, or the person who killed the R brothers was also responsible for the death of Jake.
They wanted to believe the latter as they were in dire need of a scapegoat. So they began investigating who could have killed the R brothers.
Fortunately, they didn't need to do much investigation about this. Apparently, word on the street was that the Black Mantis group was at war with the society of thieves.
Most of the issue about the cause of the war wasn't clear. All they knew was that the Black Mantis group did something for the society of thieves and wasn't paid in full. So the Black Mantis group began hunting the gangs.
