That quote from Modesto police officer Chris Adams is from a different incident in which a fire was started by “burners.” So it’s pretty clear that there’s been controversy about this before. It seems very odd to me that police would call the non-incendiary devices “burners.”

I just don’t know, and there doesn’t appear to be much about it online except that one statement on the record which seems to indicate that “burners” is used only for the incendiary devices.