Have they stated what they think occurred yet?
Explosion by intent?
rival business? Or insurance?
Should be murder if it was at all intentionality caused as part of an Insurance job. What a terrible, random and crappy way to die.
Hopefully the truth will come out in the trial.
But what on earth were they thinking with a family living above? How were they going to ensure those people upstairs got out alive and they must have known the family's home would be destroyed?
As above, scum.

And how setting/conspiring to set, fire to a building full of people, killing them all in the process, doesn't justify Murder charges I really do not know.