I can't actually see any connection between a 1992 arrest for cooking meth for the purpose of trafficking, a motorcycle gang, and the murder of a five year old child in 2014. In fact, members of motorcycle gangs might take offence at the suggestion that they have some connection to a man that is accused of murdering a young child at his grandparent's home.
I think that some are speculating that the bankruptcy triggered the murders. The theory being that given DG's past, perhaps he has some connections that would like to filter money, or would like to filter his own money, through a dummy company. When the dummy company goes under, along with the money, individuals may get a bit testy. They may even get angry, especially if they were told that too bad, it's all gone, if you don't like it, call the police. I understand what Stan L was trying to get across, and he can correct me if I missed something. IMO, I'm not seeing the accomplice angle, but the money theory is plausible. The patent dispute is equally plausible.
I assume LE is pouring through all the financials and will have a complete picture by trial, if there is one.