The toddler is safe and your wife and the others are under immediate threat.
Lock the child in the car and do what you can for the immediate threat.
The likelihood of anything happening to the child is remote and the likelihood of someone in the store being hurt, or killed, is very high.
I don't know what to do about the 2nd BG?? Maybe take him at gunpoint into the store as a shield and hope for a chance to finish the BG inside.
This is sort of fun, but I really have no other ideas that come quickly enough to be any good.
